ENTEGRIS INC
S-1/A, EX-1.1, 2000-06-19
PLASTICS PRODUCTS, NEC
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                                                                     Exhibit 1.1

================================================================================



                                 ENTEGRIS, INC.

                             a Minnesota corporation


                            13,000,000 Common Shares


                               PURCHASE AGREEMENT












Dated:    *      , 2000




================================================================================
<PAGE>

                                Table of Contents

                                                                           Page
                                                                           ----

SECTION 1.  Representations and Warranties....................................3

   (a)  Representations and Warranties by the Company.........................3
        (i)      Compliance with Registration Requirements....................3
        (ii)     Independent Accountants......................................4
        (iii)    Financial Statements.........................................4
        (iv)     No Material Adverse Change in Business.......................4
        (v)      Good Standing of the Company.................................4
        (vi)     Good Standing of Subsidiaries................................5
        (vii)    Capitalization...............................................5
        (viii)   Authorization of Agreement...................................5
        (ix)     Authorization and Description of Securities..................5
        (x)      Absence of Defaults and Conflicts............................6
        (xi)     Absence of Labor Dispute.....................................6
        (xii)    Absence of Proceedings.......................................6
        (xiii)   Accuracy of Exhibits.........................................7
        (xiv)    Possession of Intellectual Property..........................7
        (xv)     Absence of Further Requirements..............................7
        (xvi)    Possession of Licenses and Permits...........................7
        (xvii)   Title to Property............................................8
        (xviii)  Compliance with Cuba Act.....................................8
        (xix)    Investment Company Act.......................................8
        (xx)     Environmental Laws...........................................8
        (xxi)    Registration Rights..........................................9
   (b)  Representations and Warranties by the Selling Shareholders............9
        (i)      Accurate Disclosure..........................................9
        (ii)     Authorization of Agreements..................................9
        (iii)    Good and Marketable Title...................................10
        (iv)     Due Execution of Power of Attorney and Custody
                 Agreement...................................................10
        (v)      Absence of Manipulation.....................................10
        (vi)     Absence of Further Requirements.............................10
        (vii)    Restriction on Sale of Securities...........................11
        (viii)   Certificates Suitable for Transfer..........................11
        (ix)     No Association with NASD....................................11
   (c)  Representations and Warranties by the Plan...........................11
        (i)      Establishment and Qualification of Plan.....................11
        (ii)     No Prohibited Transaction; No Fiduciary.....................12
   (d)  Officer's Certificates...............................................12

SECTION 2.  Sale and Delivery to Underwriters; Closing.......................12

   (a)  Initial Securities...................................................12
   (b)  Option Securities....................................................12


                                       i
<PAGE>

   (c)  Payment..............................................................13
   (d)  Denominations; Registration..........................................13

SECTION 3.  Covenants of the Company.........................................14

   (a)  Compliance with Securities Regulations and Commission Requests.......14
   (b)  Filing of Amendments.................................................14
   (c)  Delivery of Registration Statements..................................14
   (d)  Delivery of Prospectuses.............................................15
   (e)  Continued Compliance with Securities Laws............................15
   (f)  Blue Sky Qualifications..............................................15
   (g)  Rule 158.............................................................15
   (h)  Use of Proceeds......................................................16
   (i)  Listing..............................................................16
   (j)  Restriction on Sale of Securities....................................16
   (k)  Reporting Requirements...............................................16
   (l)  Compliance with NASD Rules...........................................16
   (m)  Compliance with Rule 463.............................................17

SECTION 4.  Payment of Expenses..............................................17

   (b)  Expenses of the Selling Shareholders.................................17
   (c)  Termination of Agreement.............................................17
   (d)  Allocation of Expenses...............................................18

SECTION 5.  Conditions of Underwriters' Obligations..........................18

   (a)  Effectiveness of Registration Statement..............................18
   (b)  Opinion of Counsel for Company.......................................18
   (c)  Opinion of Counsel for the Selling Shareholders......................18
   (d)  Opinion of Counsel for Underwriters..................................18
   (e)  Officers' Certificate................................................19
   (f)  Certificate of Selling Shareholders..................................19
   (g)  Accountant's Comfort Letter..........................................19
   (h)  Bring-down Comfort Letter............................................19
   (i)  Approval of Listing..................................................19
   (j)  No Objection.........................................................20
   (k)  Lock-up Agreements...................................................20
   (l)  Conditions to Purchase of Option Securities..........................20
        (i)   Officers' Certificate..........................................20
        (ii)  Certificate of WCB.............................................20
        (iii) Opinion of Counsel for Company.................................20
        (iv)  Opinion of Counsel for WCB.....................................20
        (v)   Opinion of Counsel for Underwriters............................20
        (vi)  Bring-down Comfort Letter......................................20
   (m)  Additional Documents.................................................21
   (n)  Termination of Agreement.............................................21

SECTION 6.  Indemnification..................................................21


                                       ii
<PAGE>

   (a)  Indemnification of Underwriters......................................21
   (b)  Indemnification of Company, Directors and Officers and
        Selling Shareholders.................................................22
   (c)  Actions against Parties; Notification................................22
   (d)  Settlement without Consent if Failure to Reimburse...................23
   (e)  Indemnification for Reserved Securities..............................23
   (f)  Other Agreements with Respect to Indemnification.....................23

SECTION 7.  Contribution.....................................................24

SECTION 8.  Representations, Warranties and Agreements to
            Survive Delivery.................................................25

SECTION 9.  Termination of Agreement.........................................25

   (a)  Termination; General.................................................25
   (b)  Liabilities..........................................................26

SECTION 10. Default by One or More of the Underwriters.......................26

SECTION 11. Default by one or more of the Selling Shareholders or
            the Company......................................................26

SECTION 12. Notices..........................................................27

SECTION 13. Parties..........................................................27

SECTION 14. Governing Law and Time...........................................28

SECTION 15. Effect of Headings...............................................28


SCHEDULES
   Schedule A - List of Underwriters....................................Sch A-1
   Schedule B - List of Selling Shareholders............................Sch B-1
   Schedule C - Pricing Information.....................................Sch C-1
  [Schedule D - List of Persons Subject to Lock-up......................Sch D-1]

EXHIBITS
   Exhibit A - Form of Opinion of Company's Counsel.........................A-1
   Exhibit B - Form of Opinion for the Selling Shareholders.................B-1
  [Exhibit C - Form of Lock-up Letter.......................................C-1]


                                      iii
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                                 ENTEGRIS, INC.

                             a Minnesota corporation

                            13,000,000 Common Shares

                           (Par Value $.01 Per Share)

                               PURCHASE AGREEMENT
                               ------------------

                                                                      *   , 2000


MERRILL LYNCH & CO.
Merrill Lynch, Pierce, Fenner & Smith
Incorporated
Donaldson, Lufkin & Jenrette Securities Corporation
Salomon Smith Barney Inc.
U.S. Bancorp Piper Jaffray Inc.
  as Representatives of the several Underwriters
c/o Merrill Lynch & Co.
Merrill Lynch, Pierce, Fenner & Smith
Incorporated
North Tower
World Financial Center
New York, New York  10281-1209

Ladies and Gentlemen:

     Entegris, Inc., a Minnesota corporation (the "Company"), the Entegris, Inc.
Employee Stock Ownership Plan (the "Plan") and WCB Holding LLC ("WCB" and
together with the Plan, the "Selling Shareholders"), confirm their respective
agreements with Merrill Lynch & Co., Merrill Lynch, Pierce, Fenner & Smith
Incorporated ("Merrill Lynch") and each of the other Underwriters named in
Schedule A hereto (collectively, the "Underwriters", which term shall also
include any underwriter substituted as hereinafter provided in Section 10
hereof), for whom Merrill Lynch, Donaldson, Lufkin & Jenrette Securities
Corporation, Salomon Smith Barney Inc. and U.S. Bancorp Piper Jaffray Inc. are
acting as representatives (in such capacity, the "Representatives"), with
respect to (i) the sale by the Company and the Selling Shareholders, acting
severally and not jointly, and the purchase by the Underwriters, acting
severally and not jointly, of the respective numbers of common shares, par value
$.01 per share, of the Company ("Common Shares") set forth in Schedules A and B
hereto and (ii) the grant by the Company and WCB to the Underwriters, acting
severally and not jointly, of the option described in Section 2(b) hereof to
purchase all or any part of 1,950,000 additional Common Shares to cover
over-allotments, if any. The aforesaid 13,000,000 Common Shares (the "Initial
Securities") to be
<PAGE>

purchased by the Underwriters and all or any part of the 1,950,000 Common Shares
subject to the option described in Section 2(b) hereof (the "Option Securities")
are hereinafter called, collectively, the "Securities".

     The Company and the Selling Shareholders understand that the Underwriters
propose to make a public offering of the Securities as soon as the
Representatives deem advisable after this Agreement has been executed and
delivered.

     The Company, the Selling Shareholders and the Underwriters agree that up to
650,000 shares of the Securities to be purchased by the Underwriters (the
"Reserved Securities") shall be reserved for sale by the Underwriters to persons
having business relationships with the Company, as part of the distribution of
the Securities by the Underwriters, subject to the terms of this Agreement, the
applicable rules, regulations and interpretations of the National Association of
Securities Dealers, Inc. and all other applicable laws, rules and regulations.
To the extent that such Reserved Securities are not orally confirmed for
purchase by such eligible employees and persons having business relationships
with the Company by the end of the first business day after the date of this
Agreement, such Reserved Securities may be offered to the public as part of the
public offering contemplated hereby.

     The Company has filed with the Securities and Exchange Commission (the
"Commission") a registration statement on Form S-1 (No. 333-33668) covering the
registration of the Securities under the Securities Act of 1933, as amended (the
"1933 Act"), including the related preliminary prospectus or prospectuses.
Promptly after execution and delivery of this Agreement, the Company will either
(i) prepare and file a prospectus in accordance with the provisions of Rule 430A
("Rule 430A") of the rules and regulations of the Commission under the 1933 Act
(the "1933 Act Regulations") and paragraph (b) of Rule 424 ("Rule 424(b)") of
the 1933 Act Regulations or (ii) if the Company has elected to rely upon Rule
434 ("Rule 434") of the 1933 Act Regulations, prepare and file a term sheet (a
"Term Sheet") in accordance with the provisions of Rule 434 and Rule 424(b). The
information included in such prospectus or in such Term Sheet, as the case may
be, that was omitted from such registration statement at the time it became
effective but that is deemed to be part of such registration statement at the
time it became effective (a) pursuant to paragraph (b) of Rule 430A is referred
to as "Rule 430A Information" or (b) pursuant to paragraph (d) of Rule 434 is
referred to as "Rule 434 Information." Each prospectus used before such
registration statement became effective, and any prospectus that omitted, as
applicable, the Rule 430A Information or the Rule 434 Information, that was used
after such effectiveness and prior to the execution and delivery of this
Agreement, is herein called a "preliminary prospectus." Such registration
statement, including the exhibits thereto and schedules thereto at the time it
became effective and including the Rule 430A Information and the Rule 434
Information, as applicable, is herein called the "Registration Statement." Any
registration statement filed pursuant to Rule 462(b) of the 1933 Act Regulations
is herein referred to as the "Rule 462(b) Registration Statement," and after
such filing the term "Registration Statement" shall include the Rule 462(b)
Registration Statement. The final prospectus in the form first furnished to the
Underwriters for use in connection with the offering of the Securities is herein
called the "Prospectus." If Rule 434 is relied on, the term "Prospectus" shall
refer to the preliminary prospectus dated _____, 2000 together with the Term
Sheet and all references in this Agreement to the date of the Prospectus shall
mean the date of the Term Sheet.


                                       2
<PAGE>

For purposes of this Agreement, all references to the Registration Statement,
any preliminary prospectus, the Prospectus or any Term Sheet or any amendment or
supplement to any of the foregoing shall be deemed to include the copy filed
with the Commission pursuant to its Electronic Data Gathering, Analysis and
Retrieval system ("EDGAR").

     SECTION 1. Representations and Warranties.

          (a) Representations and Warranties by the Company. The Company
     represents and warrants to each Underwriter as of the date hereof, as of
     the Closing Time referred to in Section 2(c) hereof, and as of each Date of
     Delivery (if any) referred to in Section 2(b) hereof, and agrees with each
     Underwriter, as follows:

               (i) Compliance with Registration Requirements. Each of the
          Registration Statement and any Rule 462(b) Registration Statement has
          become effective under the 1933 Act and no stop order suspending the
          effectiveness of the Registration Statement or any Rule 462(b)
          Registration Statement has been issued under the 1933 Act and no
          proceedings for that purpose have been instituted or are pending or,
          to the knowledge of the Company, are contemplated by the Commission,
          and any request on the part of the Commission for additional
          information has been complied with.

               At the respective times the Registration Statement, any Rule
          462(b) Registration Statement and any post-effective amendments
          thereto became effective and at the Closing Time (and, if any Option
          Securities are purchased, at the Date of Delivery), the Registration
          Statement, the Rule 462(b) Registration Statement and any amendments
          and supplements thereto complied and will comply in all material
          respects with the requirements of the 1933 Act and the 1933 Act
          Regulations and did not and will not contain an untrue statement of a
          material fact or omit to state a material fact required to be stated
          therein or necessary to make the statements therein not misleading,
          and the Prospectus, any preliminary prospectus and any supplement
          thereto or prospectus wrapper prepared in connection therewith, at
          their respective times of issuance and at the Closing Time, complied
          and will comply in all material respects with any applicable laws or
          regulations of foreign jurisdictions in which the Prospectus and such
          preliminary prospectus, as amended or supplemented, if applicable, are
          distributed in connection with the offer and sale of Reserved
          Securities. Neither the Prospectus nor any amendments or supplements
          thereto (including any prospectus wrapper), at the time the Prospectus
          or any such amendment or supplement was issued and at the Closing Time
          (and, if any Option Securities are purchased, at the Date of
          Delivery), included or will include an untrue statement of a material
          fact or omitted or will omit to state a material fact necessary in
          order to make the statements therein, in the light of the
          circumstances under which they were made, not misleading. If Rule 434
          is used, the Company will comply with the requirements of Rule 434 and
          the Prospectus shall not be "materially different", as such term is
          used in Rule 434, from the prospectus included in the Registration
          Statement at the time it became effective. The representations and
          warranties in this subsection shall not apply to statements in or
          omissions from the Registration Statement or Prospectus made in
          reliance upon and in conformity with information furnished to the
          Company in


                                       3
<PAGE>

          writing by any Underwriter through Merrill Lynch expressly for use in
          the Registration Statement or Prospectus.

               Each preliminary prospectus and the prospectus filed as part of
          the Registration Statement as originally filed or as part of any
          amendment thereto, or filed pursuant to Rule 424 under the 1933 Act,
          complied when so filed in all material respects with the 1933 Act
          Regulations and each preliminary prospectus and the Prospectus
          delivered to the Underwriters for use in connection with this offering
          was identical to the electronically transmitted copies thereof filed
          with the Commission pursuant to EDGAR, except to the extent permitted
          by Regulation S-T.

               (ii) Independent Accountants. The accountants who certified the
          financial statements and supporting schedules included in the
          Registration Statement are independent public accountants as required
          by the 1933 Act and the 1933 Act Regulations.

               (iii) Financial Statements. The financial statements included in
          the Registration Statement and the Prospectus, together with the
          related schedules and notes, present fairly the financial position of
          the Company and its consolidated subsidiaries at the dates indicated
          and the statement of operations, stockholders' equity and cash flows
          of the Company and its consolidated subsidiaries for the periods
          specified; said financial statements have been prepared in conformity
          with generally accepted accounting principles ("GAAP") applied on a
          consistent basis throughout the periods involved. The supporting
          schedules included in the Registration Statement present fairly in
          accordance with GAAP the information required to be stated therein.
          The selected financial data and the summary financial information
          included in the Prospectus present fairly the information shown
          therein and have been compiled on a basis consistent with that of the
          audited financial statements included in the Registration Statement.

               (iv) No Material Adverse Change in Business. Since the respective
          dates as of which information is given in the Registration Statement
          and the Prospectus, except as otherwise stated therein, (A) there has
          been no material adverse change in the condition, financial or
          otherwise, or in the earnings, business affairs or business prospects
          of the Company and its subsidiaries considered as one enterprise,
          whether or not arising in the ordinary course of business (a "Material
          Adverse Effect"), (B) there have been no transactions entered into by
          the Company or any of its subsidiaries, other than those in the
          ordinary course of business, which are material with respect to the
          Company and its subsidiaries considered as one enterprise, and (C)
          there has been no dividend or distribution of any kind declared, paid
          or made by the Company on any class of its capital stock.

               (v) Good Standing of the Company. The Company has been duly
          organized and is validly existing as a corporation in good standing
          under the laws of the State of Minnesota and has corporate power and
          authority to own, lease and operate its properties and to conduct its
          business as described in the Prospectus and to enter into and perform
          its obligations under this Agreement; and the Company is duly
          qualified as a foreign


                                       4
<PAGE>

          corporation to transact business and is in good standing in each other
          jurisdiction in which such qualification is required, whether by
          reason of the ownership or leasing of property or the conduct of
          business, except where the failure so to qualify or to be in good
          standing would not result in a Material Adverse Effect.

               (vi) Good Standing of Subsidiaries. Each subsidiary of the
          Company (each a "Subsidiary" and, collectively, the "Subsidiaries")
          has been duly organized and is validly existing as a corporation in
          good standing under the laws of the jurisdiction of its incorporation,
          has corporate power and authority to own, lease and operate its
          properties and to conduct its business as described in the Prospectus
          and is duly qualified as a foreign corporation to transact business
          and is in good standing in each jurisdiction in which such
          qualification is required, whether by reason of the ownership or
          leasing of property or the conduct of business, except where the
          failure so to qualify or to be in good standing would not result in a
          Material Adverse Effect; except as otherwise disclosed in the
          Registration Statement, all of the issued and outstanding capital
          stock of each such Subsidiary has been duly authorized and validly
          issued, is fully paid and non-assessable and is owned by the Company,
          directly or through subsidiaries, free and clear of any security
          interest, mortgage, pledge, lien, encumbrance, claim or equity; none
          of the outstanding shares of capital stock of any Subsidiary was
          issued in violation of the preemptive or similar rights of any
          securityholder of such Subsidiary. The only subsidiaries of the
          Company are the subsidiaries listed on Exhibit 21.1 to the
          Registration Statement.

               (vii) Capitalization. The authorized, issued and outstanding
          capital stock of the Company is as set forth in the Prospectus in the
          column entitled "Actual" under the caption "Capitalization" (except
          for subsequent issuances, if any, pursuant to this Agreement, pursuant
          to reservations, agreements or employee benefit plans referred to in
          the Prospectus or pursuant to the exercise of convertible securities
          or options referred to in the Prospectus). The shares of issued and
          outstanding capital stock, including the Securities to be purchased by
          the Underwriters from the Selling Shareholders, have been duly
          authorized and validly issued and are fully paid and non-assessable;
          none of the outstanding shares of capital stock, including the
          Securities to be purchased by the Underwriters from the Selling
          Shareholders, was issued in violation of the preemptive or other
          similar rights of any securityholder of the Company.

               (viii) Authorization of Agreement. This Agreement has been duly
          authorized, executed and delivered by the Company.

               (ix) Authorization and Description of Securities. The Securities
          to be purchased by the Underwriters from the Company have been duly
          authorized for issuance and sale to the Underwriters pursuant to this
          Agreement and, when issued and delivered by the Company pursuant to
          this Agreement against payment of the consideration set forth herein,
          will be validly issued and fully paid and non-assessable; the Common
          Shares conform to all statements relating thereto contained in the
          Prospectus and such description conforms to the rights set forth in
          the instruments defining the same; no holder of the Securities will be
          subject to personal liability by reason of being such a


                                       5
<PAGE>

          holder; and the issuance of the Securities is not subject to the
          preemptive or other similar rights of any securityholder of the
          Company.

               (x) Absence of Defaults and Conflicts. Neither the Company nor
          any of its subsidiaries is in violation of its charter or by-laws or
          in default in the performance or observance of any obligation,
          agreement, covenant or condition contained in any contract, indenture,
          mortgage, deed of trust, loan or credit agreement, note, lease or
          other agreement or instrument to which the Company or any of its
          subsidiaries is a party or by which it or any of them may be bound, or
          to which any of the property or assets of the Company or any
          subsidiary is subject (collectively, "Agreements and Instruments")
          except for such defaults that would not result in a Material Adverse
          Effect; and the execution, delivery and performance of this Agreement
          and the consummation of the transactions contemplated herein and in
          the Registration Statement (including the issuance and sale of the
          Securities and the use of the proceeds from the sale of the Securities
          as described in the Prospectus under the caption "Use of Proceeds")
          and compliance by the Company with its obligations hereunder have been
          duly authorized by all necessary corporate action and do not and will
          not, whether with or without the giving of notice or passage of time
          or both, conflict with or constitute a breach of, or default or
          Repayment Event (as defined below) under, or result in the creation or
          imposition of any lien, charge or encumbrance upon any property or
          assets of the Company or any subsidiary pursuant to, the Agreements
          and Instruments (except for such conflicts, breaches or defaults or
          liens, charges or encumbrances that would not result in a Material
          Adverse Effect), nor will such action result in any violation of the
          provisions of the charter or by-laws of the Company or any subsidiary
          or any applicable law, statute, rule, regulation, judgment, order,
          writ or decree of any government, government instrumentality or court,
          domestic or foreign, having jurisdiction over the Company or any
          subsidiary or any of their assets, properties or operations. As used
          herein, a "Repayment Event" means any event or condition which gives
          the holder of any note, debenture or other evidence of indebtedness
          (or any person acting on such holder's behalf) the right to require
          the repurchase, redemption or repayment of all or a portion of such
          indebtedness by the Company or any subsidiary.

               (xi) Absence of Labor Dispute. No labor dispute with the
          employees of the Company or any subsidiary exists or, to the knowledge
          of the Company, is imminent, and the Company is not aware of any
          existing or imminent labor disturbance by the employees of any of its
          or any subsidiary's principal suppliers, manufacturers, customers or
          contractors, which, in either case, may reasonably be expected to
          result in a Material Adverse Effect.

               (xii) Absence of Proceedings. There is no action, suit,
          proceeding, inquiry or investigation before or brought by any court or
          governmental agency or body, domestic or foreign, now pending, or, to
          the knowledge of the Company, threatened, against or affecting the
          Company or any subsidiary, which is required to be disclosed in the
          Registration Statement (other than as disclosed therein), or which
          might reasonably be expected to result in a Material Adverse Effect,
          or which might reasonably be expected to materially and adversely
          affect the properties or assets thereof or the consummation of the


                                       6
<PAGE>

          transactions contemplated in this Agreement or the performance by the
          Company of its obligations hereunder; the aggregate of all pending
          legal or governmental proceedings to which the Company or any
          subsidiary is a party or of which any of their respective property or
          assets is the subject which are not described in the Registration
          Statement, including ordinary routine litigation incidental to the
          business, could not reasonably be expected to result in a Material
          Adverse Effect.

               (xiii) Accuracy of Exhibits. There are no contracts or documents
          which are required to be described in the Registration Statement or
          the Prospectus or to be filed as exhibits thereto which have not been
          so described and filed as required.

               (xiv) Possession of Intellectual Property. The Company and its
          subsidiaries own or possess, or can acquire on reasonable terms,
          adequate patents, patent rights, licenses, inventions, copyrights,
          know-how (including trade secrets and other unpatented and/or
          unpatentable proprietary or confidential information, systems or
          procedures), trademarks, service marks, trade names or other
          intellectual property (collectively, "Intellectual Property")
          necessary to carry on the business now operated by them, and neither
          the Company nor any of its subsidiaries has received any notice or is
          otherwise aware of any infringement of or conflict with asserted
          rights of others with respect to any Intellectual Property or of any
          facts or circumstances which would render any Intellectual Property
          invalid or inadequate to protect the interest of the Company or any of
          its subsidiaries therein, and which infringement or conflict (if the
          subject of any unfavorable decision, ruling or finding) or invalidity
          or inadequacy, singly or in the aggregate, would result in a Material
          Adverse Effect.

               (xv) Absence of Further Requirements. No filing with, or
          authorization, approval, consent, license, order, registration,
          qualification or decree of, any court or governmental authority or
          agency is necessary or required for the performance by the Company of
          its obligations hereunder, in connection with the offering, issuance
          or sale of the Securities hereunder or the consummation of the
          transactions contemplated by this Agreement, except such as have been
          already obtained or as may be required under the 1933 Act or the 1933
          Act Regulations or state securities laws.

               (xvi) Possession of Licenses and Permits. The Company and its
          subsidiaries possess such permits, licenses, approvals, consents and
          other authorizations (collectively, "Governmental Licenses") issued by
          the appropriate federal, state, local or foreign regulatory agencies
          or bodies necessary to conduct the business now operated by them; the
          Company and its subsidiaries are in compliance with the terms and
          conditions of all such Governmental Licenses, except where the failure
          so to comply would not, singly or in the aggregate, have a Material
          Adverse Effect; all of the Governmental Licenses are valid and in full
          force and effect, except when the invalidity of such Governmental
          Licenses or the failure of such Governmental Licenses to be in full
          force and effect would not have a Material Adverse Effect; and neither
          the Company nor any of its subsidiaries has received any notice of
          proceedings relating to the revocation or modification of any such
          Governmental Licenses which, singly or in the aggregate, if the
          subject of an unfavorable decision, ruling or finding, would result in
          a Material Adverse Effect.


                                       7
<PAGE>

               (xvii) Title to Property. The Company and its subsidiaries have
          good and marketable title to all real property owned by the Company
          and its subsidiaries and good title to all other properties owned by
          them, in each case, free and clear of all mortgages, pledges, liens,
          security interests, claims, restrictions or encumbrances of any kind
          except such as (a) are described in the Prospectus or (b) do not,
          singly or in the aggregate, materially affect the value of such
          property and do not interfere with the use made and proposed to be
          made of such property by the Company or any of its subsidiaries; and
          all of the leases and subleases material to the business of the
          Company and its subsidiaries, considered as one enterprise, and under
          which the Company or any of its subsidiaries holds properties
          described in the Prospectus, are in full force and effect, and neither
          the Company nor any subsidiary has any notice of any material claim of
          any sort that has been asserted by anyone adverse to the rights of the
          Company or any subsidiary under any of the leases or subleases
          mentioned above, or affecting or questioning the rights of the Company
          or such subsidiary to the continued possession of the leased or
          subleased premises under any such lease or sublease.

               (xviii) Compliance with Cuba Act. The Company has complied with,
          and is and will be in compliance with, the provisions of that certain
          Florida act relating to disclosure of doing business with Cuba,
          codified as Section 517.075 of the Florida statutes, and the rules and
          regulations thereunder (collectively, the "Cuba Act") or is exempt
          therefrom.

               (xix) Investment Company Act. The Company is not, and upon the
          issuance and sale of the Securities as herein contemplated and the
          application of the net proceeds therefrom as described in the
          Prospectus will not be, an "investment company" or an entity
          "controlled" by an "investment company" as such terms are defined in
          the Investment Company Act of 1940, as amended (the "1940 Act").

               (xx) Environmental Laws. Except as described in the Registration
          Statement and except as would not, singly or in the aggregate, result
          in a Material Adverse Effect, (A) neither the Company nor any of its
          subsidiaries is in violation of any federal, state, local or foreign
          statute, law, rule, regulation, ordinance, code, policy or rule of
          common law or any judicial or administrative interpretation thereof,
          including any judicial or administrative order, consent, decree or
          judgment, relating to pollution or protection of human health, the
          environment (including, without limitation, ambient air, surface
          water, groundwater, land surface or subsurface strata) or wildlife,
          including, without limitation, laws and regulations relating to the
          release or threatened release of chemicals, pollutants, contaminants,
          wastes, toxic substances, hazardous substances, petroleum or petroleum
          products (collectively, "Hazardous Materials") or to the manufacture,
          processing, distribution, use, treatment, storage, disposal, transport
          or handling of Hazardous Materials (collectively, "Environmental
          Laws"), (B) the Company and its subsidiaries have all permits,
          authorizations and approvals required under any applicable
          Environmental Laws and are each in compliance with their requirements,
          (C) there are no pending or threatened administrative, regulatory or
          judicial actions, suits, demands, demand letters, claims, liens,
          notices of noncompliance or violation, investigation or proceedings
          relating to any Environmental Law against the Company or any of its
          subsidiaries and (D) there are no events or circumstances that might
          reasonably be


                                       8
<PAGE>

          expected to form the basis of an order for clean-up or remediation, or
          an action, suit or proceeding by any private party or governmental
          body or agency, against or affecting the Company or any of its
          subsidiaries relating to Hazardous Materials or any Environmental
          Laws.

               (xxi) Registration Rights. Except as disclosed in the Prospectus,
          there are no persons with registration rights or other similar rights
          to have any securities registered pursuant to the Registration
          Statement or otherwise registered by the Company under the 1933 Act.
          Any such registration rights or similar rights have been waived.

          (b) Representations and Warranties by the Selling Shareholders. Each
     Selling Shareholder severally represents and warrants to each Underwriter
     as of the date hereof, as of the Closing Time, and, if the Selling
     Shareholder is selling Option Securities on a Date of Delivery, as of each
     such Date of Delivery, and agrees with each Underwriter, as follows:

               (i) Accurate Disclosure. To the best knowledge of such Selling
          Shareholder, the representations and warranties of the Company
          contained in Section 1(a) hereof are true and correct; such Selling
          Shareholder has reviewed and is familiar with the Registration
          Statement and the Prospectus and neither the Prospectus nor any
          amendments or supplements thereto (including any prospectus wrapper)
          includes any untrue statement of a material fact or omits to state a
          material fact necessary in order to make the statements therein, in
          the light of the circumstances under which they were made, not
          misleading; such Selling Shareholder is not prompted to sell the
          Securities to be sold by such Selling Shareholder hereunder by any
          information concerning the Company or any subsidiary of the Company
          which is not set forth in the Prospectus.

               (ii) Authorization of Agreements. Each Selling Shareholder has
          the full right, power and authority to enter into this Agreement and a
          Power of Attorney and Custody Agreement (the "Power of Attorney and
          Custody Agreement") and to sell, transfer and deliver the Securities
          to be sold by such Selling Shareholder hereunder. The execution and
          delivery of this Agreement and the Power of Attorney and Custody
          Agreement and the sale and delivery of the Securities to be sold by
          such Selling Shareholder and the consummation of the transactions
          contemplated herein and compliance by such Selling Shareholder with
          its obligations hereunder have been duly authorized by such Selling
          Shareholder and do not and will not, whether with or without the
          giving of notice or passage of time or both, conflict with or
          constitute a breach of, or default under, or result in the creation or
          imposition of any tax, lien, charge or encumbrance upon the Securities
          to be sold by such Selling Shareholder or any property or assets of
          such Selling Shareholder pursuant to any contract, indenture,
          mortgage, deed of trust, loan or credit agreement, note, license,
          lease or other agreement or instrument to which such Selling
          Shareholder is a party or by which such Selling Shareholder may be
          bound, or to which any of the property or assets of such Selling
          Shareholder is subject, nor will such action result in any violation
          of the provisions of the charter or by-laws or other organizational
          instrument of such Selling Shareholder, if applicable, or any
          applicable treaty, law, statute, rule, regulation, judgment, order,
          writ or decree of any government, government


                                       9
<PAGE>

          instrumentality or court, domestic or foreign, having jurisdiction
          over such Selling Shareholder or any of its properties.

               (iii) Good and Marketable Title. Such Selling Shareholder has and
          will at the Closing Time and, with respect to WCB only, if any Option
          Securities are purchased, on the Date of Delivery have good and
          marketable title to the Securities to be sold by such Selling
          Shareholder hereunder, free and clear of any security interest,
          mortgage, pledge, lien, charge, claim, equity or encumbrance of any
          kind, other than pursuant to this Agreement; and upon delivery of such
          Securities and payment of the purchase price therefor as herein
          contemplated, assuming each such Underwriter has no notice of any
          adverse claim, each of the Underwriters will receive good and
          marketable title to the Securities purchased by it from such Selling
          Shareholder, free and clear of any security interest, mortgage,
          pledge, lien, charge, claim, equity or encumbrance of any kind.

               (iv) Due Execution of Power of Attorney and Custody Agreement.
          Such Selling Shareholder has duly executed and delivered, in the form
          heretofore furnished to the Representatives, the Power of Attorney and
          Custody Agreement with        *        as attorney(s)-in-fact (the
          "Attorney(s)-in-Fact") and   *   , as custodian (the "Custodian"); the
          Custodian is authorized to deliver the Securities to be sold by such
          Selling Shareholder hereunder and to accept payment therefor; and each
          Attorney-in-Fact is authorized to execute and deliver this Agreement
          and the certificate referred to in Section 5(f) or that may be
          required pursuant to Section(s) 5(l) and 5(m) on behalf of such
          Selling Shareholder, to sell, assign and transfer to the Underwriters
          the Securities to be sold by such Selling Shareholder hereunder, to
          determine the purchase price to be paid by the Underwriters to such
          Selling Shareholder, as provided in Section 2(a) hereof, to authorize
          the delivery of the Securities to be sold by such Selling Shareholder
          hereunder, to accept payment therefor, and otherwise to act on behalf
          of such Selling Shareholder in connection with this Agreement.

               (v) Absence of Manipulation. Such Selling Shareholder has not
          taken, and will not take, directly or indirectly, any action which is
          designed to or which has constituted or which might reasonably be
          expected to cause or result in stabilization or manipulation of the
          price of any security of the Company to facilitate the sale or resale
          of the Securities.

               (vi) Absence of Further Requirements. No filing with, or consent,
          approval, authorization, order, registration, qualification or decree
          of, any court or governmental authority or agency, domestic or
          foreign, is necessary or required for the performance by each Selling
          Shareholder of its obligations hereunder or in the Power of Attorney
          and Custody Agreement, or in connection with the sale and delivery of
          the Securities hereunder or the consummation of the transactions
          contemplated by this Agreement, except (i) such as may have previously
          been made or obtained or as may be required under the 1933 Act or the
          1933 Act Regulations or state securities laws and (ii) such as have
          been obtained under the laws and regulations of jurisdictions outside
          the United States in which the Reserved Securities are offered.


                                       10
<PAGE>

               (vii) Restriction on Sale of Securities. During a period of 180
          days from the date of the Prospectus, such Selling Shareholder will
          not, without the prior written consent of Merrill Lynch, (i) offer,
          pledge, sell, contract to sell, sell any option or contract to
          purchase, purchase any option or contract to sell, grant any option,
          right or warrant to purchase or otherwise transfer or dispose of,
          directly or indirectly, any share of Common Stock or any securities
          convertible into or exercisable or exchangeable for Common Stock or
          file any registration statement under the 1933 Act with respect to any
          of the foregoing or (ii) enter into any swap or any other agreement or
          any transaction that transfers, in whole or in part, directly or
          indirectly, the economic consequence of ownership of the Common Stock,
          whether any such swap or transaction described in clause (i) or (ii)
          above is to be settled by delivery of Common Stock or such other
          securities, in cash or otherwise. The foregoing sentence shall not
          apply to the Securities to be sold hereunder.

               (viii) Certificates Suitable for Transfer. Certificates for all
          of the Securities to be sold by such Selling Shareholder pursuant to
          this Agreement, in suitable form for transfer by delivery or
          accompanied by duly executed instruments of transfer or assignment in
          blank with signatures guaranteed, have been placed in custody with the
          Custodian with irrevocable conditional instructions to deliver such
          Securities to the Underwriters pursuant to this Agreement.

               (ix) No Association with NASD. Neither such Selling Stockholder
          nor any of its affiliates directly, or indirectly through one or more
          intermediaries, controls, or is controlled by, or is under common
          control with, or has any other association with (within the meaning of
          Article I, Section 1(m) of the By-laws of the National Association of
          Securities Dealers, Inc.), any member firm of the National Association
          of Securities Dealers, Inc.

          (c) Representations and Warranties by the Plan. The Plan represents
     and warrants to each Underwriter as of the date hereof, as of the Closing
     Time, and agrees with each Underwriter as follows:

               (i) Establishment and Qualification of Plan. The Plan has been
          duly adopted and established as a grantor trust in accordance with the
          laws of the State of Minnesota. The Plan is qualified under Section
          401 of the Code and meets the requirements of an "employee stock
          ownership plan" within the meaning of Section 4975(e)(7) of the Code
          and 407(d)(6) of the Employee Retirement Income Security Act of 1974,
          as amended, and the regulations and published interpretations
          thereunder (collectively, "ERISA"). The trustee under the Plan has all
          requisite trust powers to enter into the transaction contemplated by
          this Agreement.

               (ii) No Prohibited Transaction; No Fiduciary. The sale of the
          Shares to be sold by the Plan to the Underwriters will not, in whole
          or in part, constitute a prohibited transaction pursuant to Section
          4975(c) of the Code or Section 406 of ERISA, and none of the
          Underwriters or any person or entity affiliated with them is a
          "fiduciary" (within


                                       11
<PAGE>

          the meaning of Section 3(21) of ERISA) of the Plan or a "named
          fiduciary" (as such term is defined in Section 402(a) (2) of ERISA) of
          the Plan.

          (d) Officer's Certificates. Any certificate signed by any officer of
     the Company or any of its subsidiaries delivered to the Representatives or
     to counsel for the Underwriters shall be deemed a representation and
     warranty by the Company to each Underwriter as to the matters covered
     thereby; and any certificate signed by or on behalf of the Selling
     Shareholders as such and delivered to the Representatives or to counsel for
     the Underwriters pursuant to the terms of this Agreement shall be deemed a
     representation and warranty by such Selling Shareholder to the Underwriters
     as to the matters covered thereby.

     SECTION 2. Sale and Delivery to Underwriters; Closing.

          (a) Initial Securities. On the basis of the representations and
     warranties herein contained and subject to the terms and conditions herein
     set forth, the Company and each Selling Shareholder, severally and not
     jointly, agree to sell to each Underwriter, severally and not jointly, and
     each Underwriter, severally and not jointly, agrees to purchase from the
     Company and each Selling Shareholder, at the price per share set forth in
     Schedule C, that proportion of the number of Initial Securities set forth
     in Schedule B opposite the name of the Company or such Selling Shareholder,
     as the case may be, which the number of Initial Securities set forth in
     Schedule A opposite the name of such Underwriter, plus any additional
     number of Initial Securities which such Underwriter may become obligated to
     purchase pursuant to the provisions of Section 10 hereof, bears to the
     total number of Initial Securities, subject, in each case, to such
     adjustments among the Underwriters as the Representatives in their sole
     discretion shall make to eliminate any sales or purchases of fractional
     securities.

          (b) Option Securities. In addition, on the basis of the
     representations and warranties herein contained and subject to the terms
     and conditions herein set forth, the Company and WCB, acting severally and
     not jointly, hereby grant an option to the Underwriters, severally and not
     jointly, to purchase up to an additional 1,950,000 Common Shares, as set
     forth in Schedule B, at the price per share set forth in Schedule C, less
     an amount per share equal to any dividends or distributions declared by the
     Company and payable on the Initial Securities but not payable on the Option
     Securities. The option hereby granted will expire 30 days after the date
     hereof and may be exercised in whole or in part from time to time only for
     the purpose of covering over-allotments which may be made in connection
     with the offering and distribution of the Initial Securities upon notice by
     the Representatives to the Company and WCB setting forth the number of
     Option Securities as to which the several Underwriters are then exercising
     the option and the time and date of payment and delivery for such Option
     Securities. Any such time and date of delivery (a "Date of Delivery") shall
     be determined by the Representatives, but shall not be later than seven
     full business days after the exercise of said option, nor in any event
     prior to the Closing Time, as hereinafter defined. If the option is
     exercised as to all or any portion of the Option Securities, each of the
     Underwriters, acting severally and not jointly, will purchase that
     proportion of the total number of Option Securities then being purchased
     which the number of Initial Securities set forth in Schedule A opposite the
     name of such Underwriter bears to the total number of Initial Securities,
     subject in each case to such adjustments as the Representatives in their
     discretion shall make to eliminate any sales or purchases of fractional
     shares and the


                                       12
<PAGE>

     Company and WCB will sell to the several Underwriters their pro rata
     portion of the number of Option Securities then being purchased by the
     several Underwriters.

          (c) Payment. Payment of the purchase price for, and delivery of
     certificates for, the Initial Securities shall be made at the offices of
     Latham & Watkins, counsel for the Underwriters, 233 South Wacker Drive,
     Suite 5800, Chicago, Illinois 60606, or at such other place as shall be
     agreed upon by the Representatives and the Company and the Selling
     Shareholders, at 9:00 A.M. (Eastern time) on the third (fourth, if the
     pricing occurs after 4:30 P.M. (Eastern time) on any given day) business
     day after the date hereof (unless postponed in accordance with the
     provisions of Section 10), or such other time not later than ten business
     days after such date as shall be agreed upon by the Representatives and the
     Company and the Selling Shareholders (such time and date of payment and
     delivery being herein called "Closing Time").

          In addition, in the event that any or all of the Option Securities are
     purchased by the Underwriters, payment of the purchase price for, and
     delivery of certificates for, such Option Securities shall be made at the
     above-mentioned offices, or at such other place as shall be agreed upon by
     the Representatives and the Company and the Selling Shareholders, on each
     Date of Delivery as specified in the notice from the Representatives to the
     Company and the Selling Shareholders.

          Payment shall be made to the Company and the Selling Shareholders by
     wire transfer of immediately available funds to bank account(s) designated
     by the Company and the Custodian pursuant to each Selling Shareholder's
     Power of Attorney and Custody Agreement, as the case may be, against
     delivery to the Representatives for the respective accounts of the
     Underwriters of certificates for the Securities to be purchased by them. It
     is understood that each Underwriter has authorized the Representatives, for
     its account, to accept delivery of, receipt for, and make payment of the
     purchase price for, the Initial Securities and the Option Securities, if
     any, which it has agreed to purchase. Merrill Lynch, individually and not
     as representative of the Underwriters, may (but shall not be obligated to)
     make payment of the purchase price for the Initial Securities or the Option
     Securities, if any, to be purchased by any Underwriter whose funds have not
     been received by the Closing Time or the relevant Date of Delivery, as the
     case may be, but such payment shall not relieve such Underwriter from its
     obligations hereunder.

          (d) Denominations; Registration. Certificates for the Initial
     Securities and the Option Securities, if any, shall be in such
     denominations and registered in such names as the Representatives may
     request in writing at least one full business day before the Closing Time
     or the relevant Date of Delivery, as the case may be. The certificates for
     the Initial Securities and the Option Securities, if any, will be made
     available for examination and packaging by the Representatives in The City
     of New York not later than 10:00 A.M. (Eastern time) on the business day
     prior to the Closing Time or the relevant Date of Delivery, as the case may
     be.

     SECTION 3. Covenants of the Company. The Company covenants with each
Underwriter as follows:

          (a) Compliance with Securities Regulations and Commission Requests.
     The Company, subject to Section 3(b), will comply with the requirements of
     Rule 430A or Rule 434,


                                       13
<PAGE>

     as applicable, and will notify the Representatives immediately, and confirm
     the notice in writing, (i) when any post-effective amendment to the
     Registration Statement shall become effective, or any supplement to the
     Prospectus or any amended Prospectus shall have been filed, (ii) of the
     receipt of any comments from the Commission, (iii) of any request by the
     Commission for any amendment to the Registration Statement or any amendment
     or supplement to the Prospectus or for additional information, and (iv) of
     the issuance by the Commission of any stop order suspending the
     effectiveness of the Registration Statement or of any order preventing or
     suspending the use of any preliminary prospectus, or of the suspension of
     the qualification of the Securities for offering or sale in any
     jurisdiction, or of the initiation or threatening of any proceedings for
     any of such purposes. The Company will promptly effect the filings
     necessary pursuant to Rule 424(b) and will take such steps as it deems
     necessary to ascertain promptly whether the form of prospectus transmitted
     for filing under Rule 424(b) was received for filing by the Commission and,
     in the event that it was not, it will promptly file such prospectus. The
     Company will make every reasonable effort to prevent the issuance of any
     stop order and, if any stop order is issued, to obtain the lifting thereof
     at the earliest possible moment.

          (b) Filing of Amendments. The Company will give the Representatives
     notice of its intention to file or prepare any amendment to the
     Registration Statement (including any filing under Rule 462(b)), any Term
     Sheet or any amendment, supplement or revision to either the prospectus
     included in the Registration Statement at the time it became effective or
     to the Prospectus, will furnish the Representatives with copies of any such
     documents a reasonable amount of time prior to such proposed filing or use,
     as the case may be, and will not file or use any such document to which the
     Representatives or counsel for the Underwriters shall object.

          (c) Delivery of Registration Statements. The Company has furnished or
     will deliver to the Representatives and counsel for the Underwriters,
     without charge, signed copies of the Registration Statement as originally
     filed and of each amendment thereto (including exhibits filed therewith or
     incorporated by reference therein) and signed copies of all consents and
     certificates of experts, and will also deliver to the Representatives,
     without charge, a conformed copy of the Registration Statement as
     originally filed and of each amendment thereto (without exhibits) for each
     of the Underwriters. The copies of the Registration Statement and each
     amendment thereto furnished to the Underwriters will be identical to the
     electronically transmitted copies thereof filed with the Commission
     pursuant to EDGAR, except to the extent permitted by Regulation S-T.

          (d) Delivery of Prospectuses. The Company has delivered to each
     Underwriter, without charge, as many copies of each preliminary prospectus
     as such Underwriter reasonably requested, and the Company hereby consents
     to the use of such copies for purposes permitted by the 1933 Act. The
     Company will furnish to each Underwriter, without charge, during the period
     when the Prospectus is required to be delivered under the 1933 Act or the
     Securities Exchange Act of 1934 (the "1934 Act"), such number of copies of
     the Prospectus (as amended or supplemented) as such Underwriter may
     reasonably request. The Prospectus and any amendments or supplements
     thereto furnished to the Underwriters will be identical to the
     electronically transmitted copies thereof filed with the Commission
     pursuant to EDGAR, except to the extent permitted by Regulation S-T.


                                       14
<PAGE>

          (e) Continued Compliance with Securities Laws. The Company will comply
     with the 1933 Act and the 1933 Act Regulations so as to permit the
     completion of the distribution of the Securities as contemplated in this
     Agreement and in the Prospectus. If at any time when a prospectus is
     required by the 1933 Act to be delivered in connection with sales of the
     Securities, any event shall occur or condition shall exist as a result of
     which it is necessary, in the opinion of counsel for the Underwriters or
     for the Company, to amend the Registration Statement or amend or supplement
     the Prospectus in order that the Prospectus will not include any untrue
     statements of a material fact or omit to state a material fact necessary in
     order to make the statements therein not misleading in the light of the
     circumstances existing at the time it is delivered to a purchaser, or if it
     shall be necessary, in the opinion of such counsel, at any such time to
     amend the Registration Statement or amend or supplement the Prospectus in
     order to comply with the requirements of the 1933 Act or the 1933 Act
     Regulations, the Company will promptly prepare and file with the
     Commission, subject to Section 3(b), such amendment or supplement as may be
     necessary to correct such statement or omission or to make the Registration
     Statement or the Prospectus comply with such requirements, and the Company
     will furnish to the Underwriters such number of copies of such amendment or
     supplement as the Underwriters may reasonably request.

          (f) Blue Sky Qualifications. The Company will use its best efforts, in
     cooperation with the Underwriters, to qualify the Securities for offering
     and sale under the applicable securities laws of such states and other
     jurisdictions (domestic or foreign) as the Representatives may designate
     and to maintain such qualifications in effect for a period of not less than
     one year from the later of the effective date of the Registration Statement
     and any Rule 462(b) Registration Statement; provided, however, that the
     Company shall not be obligated to file any general consent to service of
     process or to qualify as a foreign corporation or as a dealer in securities
     in any jurisdiction in which it is not so qualified or to subject itself to
     taxation in respect of doing business in any jurisdiction in which it is
     not otherwise so subject. In each jurisdiction in which the Securities have
     been so qualified, the Company will file such statements and reports as may
     be required by the laws of such jurisdiction to continue such qualification
     in effect for a period of not less than one year from the effective date of
     the Registration Statement and any Rule 462(b) Registration Statement.

          (g) Rule 158. The Company will timely file such reports pursuant to
     the 1934 Act as are necessary in order to make generally available to its
     securityholders as soon as practicable an earnings statement for the
     purposes of, and to provide the benefits contemplated by, the last
     paragraph of Section 11(a) of the 1933 Act.

          (h) Use of Proceeds. The Company will use the net proceeds received by
     it from the sale of the Securities in the manner specified in the
     Prospectus under "Use of Proceeds".

          (i) Listing. The Company will use its best efforts to effect and
     maintain the quotation of the Securities on the Nasdaq National Market and
     will file with the Nasdaq National Market all documents and notices
     required by the Nasdaq National Market of companies that have securities
     that are traded in the over-the-counter market and quotations for which are
     reported by the Nasdaq National Market.


                                       15
<PAGE>

          (j) Restriction on Sale of Securities. During a period of 180 days
     from the date of the Prospectus, the Company will not, without the prior
     written consent of Merrill Lynch, (i) directly or indirectly, offer,
     pledge, sell, contract to sell, sell any option or contract to purchase,
     purchase any option or contract to sell, grant any option, right or warrant
     to purchase or otherwise transfer or dispose of any Common Shares or any
     securities convertible into or exercisable or exchangeable for Common
     Shares or file any registration statement under the 1933 Act with respect
     to any of the foregoing or (ii) enter into any swap or any other agreement
     or any transaction that transfers, in whole or in part, directly or
     indirectly, the economic consequence of ownership of the Common Shares,
     whether any such swap or transaction described in clause (i) or (ii) above
     is to be settled by delivery of Common Stock or such other securities, in
     cash or otherwise. The foregoing sentence shall not apply to (A) the
     Securities to be sold hereunder, (B) any Common Shares issued by the
     Company upon the exercise of an option or warrant or the conversion of a
     security outstanding on the date hereof and referred to in the Prospectus,
     (C) any Common Shares issued or options to purchase Common Shares granted
     pursuant to existing employee benefit plans of the Company referred to in
     the Prospectus or (D) any Common Shares issued pursuant to any non-employee
     director stock plan referred to in the Prospectus.

          (k) Reporting Requirements. The Company, during the period when the
     Prospectus is required to be delivered under the 1933 Act or the 1934 Act,
     will file all documents required to be filed with the Commission pursuant
     to the 1934 Act within the time periods required by the 1934 Act and the
     rules and regulations of the Commission thereunder.

          (l) Compliance with NASD Rules. The Company hereby agrees that it will
     ensure that the Reserved Securities will be restricted as required by the
     National Association of Securities Dealers, Inc. (the "NASD") or the NASD
     rules from sale, transfer, assignment, pledge or hypothecation for a period
     of three months following the date of this Agreement. The Underwriters will
     notify the Company as to which persons will need to be so restricted. At
     the request of the Underwriters, the Company will direct the transfer agent
     to place a stop transfer restriction upon such securities for such period
     of time. Should the Company release, or seek to release, from such
     restrictions any of the Reserved Securities, the Company agrees to
     reimburse the Underwriters for any reasonable expenses (including, without
     limitation, legal expenses) they incur in connection with such release.

          (m) Compliance with Rule 463. The Company will file with the
     Commission such reports on Form SR as may be required pursuant to Rule 463
     of the 1933 Act Regulations.

     SECTION 4. Payment of Expenses. (a) Expenses. The Company and the Selling
Shareholders will pay or cause to be paid all expenses incident to the
performance of their obligations under this Agreement, including (i) the
preparation, printing and filing of the Registration Statement (including
financial statements and exhibits) as originally filed and of each amendment
thereto, (ii) the preparation, printing and delivery to the Underwriters of this
Agreement, any Agreement among Underwriters and such other documents as may be
required in connection with the offering, purchase, sale, issuance or delivery
of the Securities, (iii) the preparation, issuance and delivery of the
certificates for the Securities to the Underwriters, including any stock or
other transfer taxes and any stamp or other duties payable upon the sale,
issuance or delivery of the Securities to the Underwriters, (iv) the fees and
disbursements of the


                                       16
<PAGE>

Company's counsel, accountants and other advisors, (v) the qualification of the
Securities under securities laws in accordance with the provisions of Section
3(f) hereof, including filing fees and the reasonable fees and disbursements of
counsel for the Underwriters in connection therewith and in connection with the
preparation of the Blue Sky Survey and any supplement thereto, (vi) the printing
and delivery to the Underwriters of copies of each preliminary prospectus, any
Term Sheets and of the Prospectus and any amendments or supplements thereto,
(vii) the preparation, printing and delivery to the Underwriters of copies of
the Blue Sky Survey and any supplement thereto, (viii) the fees and expenses of
any transfer agent or registrar for the Securities and (ix) the filing fees
incident to, and the reasonable fees and disbursements of counsel to the
Underwriters in connection with, the review by the NASD of the terms of the sale
of the Securities and (x) the fees and expenses incurred in connection with the
inclusion of the Securities in the Nasdaq National Market and (xi) all costs and
expenses of the Underwriters, including the fees and disbursements of counsel
for the Underwriters, in connection with matters related to the Reserved
Securities which are designated by the Company for sale to persons having a
business relationship with the Company.

          (b) Expenses of the Selling Shareholders. The Selling Shareholders
     will pay all expenses incident to the performance of their respective
     obligations under, and the consummation of the transactions contemplated by
     this Agreement, including (i) any stamp duties, capital duties and stock
     transfer taxes, if any, payable upon the sale of the Securities to the
     Underwriters, and their transfer between the Underwriters pursuant to an
     agreement between such Underwriters, and (ii) the fees and disbursements of
     their respective counsel and accountants.

          (c) Termination of Agreement. If this Agreement is terminated by the
     Representatives in accordance with the provisions of Section 5, Section
     9(a)(i) or Section 11 hereof, the Company and the Selling Shareholders
     shall reimburse the Underwriters for all of their out-of-pocket expenses,
     including the reasonable fees and disbursements of counsel for the
     Underwriters.

          (d) Allocation of Expenses. The provisions of this Section shall not
     affect any agreement that the Company and the Selling Shareholders may make
     for the sharing of such costs and expenses.

     SECTION 5. Conditions of Underwriters' Obligations. The obligations of the
several Underwriters hereunder are subject to the accuracy of the
representations and warranties of the Company and the Selling Shareholders
contained in Section 1 hereof or in certificates of any officer of the Company
or any subsidiary of the Company or on behalf of any Selling Shareholder
delivered pursuant to the provisions hereof, to the performance by the Company
of its covenants and other obligations hereunder, and to the following further
conditions:

          (a) Effectiveness of Registration Statement. The Registration
     Statement, including any Rule 462(b) Registration Statement, has become
     effective and at Closing Time no stop order suspending the effectiveness of
     the Registration Statement shall have been issued under the 1933 Act or
     proceedings therefor initiated or threatened by the Commission, and any
     request on the part of the Commission for additional information shall have
     been complied with to the


                                       17
<PAGE>

     reasonable satisfaction of counsel to the Underwriters. A prospectus
     containing the Rule 430A Information shall have been filed with the
     Commission in accordance with Rule 424(b) (or a post-effective amendment
     providing such information shall have been filed and declared effective in
     accordance with the requirements of Rule 430A) or, if the Company has
     elected to rely upon Rule 434, a Term Sheet shall have been filed with the
     Commission in accordance with Rule 424(b).

          (b) Opinion of Counsel for Company. At Closing Time, the
     Representatives shall have received the favorable opinion, dated as of
     Closing Time, of Dorsey & Whitney, special counsel for the Company, in form
     and substance satisfactory to counsel for the Underwriters, together with
     signed or reproduced copies of such letter for each of the other
     Underwriters to the effect set forth in Exhibit A hereto and to such
     further effect as counsel to the Underwriters may reasonably request.

          (c) Opinion of Counsel for the Selling Shareholders. At Closing Time,
     the Representatives shall have received the favorable opinion, dated as of
     Closing Time, of    *   , counsel for the Selling Shareholders, in form and
     substance satisfactory to counsel for the Underwriters, together with
     signed or reproduced copies of such letter for each of the other
     Underwriters to the effect set forth in Exhibit B hereto and to such
     further effect as counsel to the Underwriters may reasonably request.

          (d) Opinion of Counsel for Underwriters. At Closing Time, the
     Representatives shall have received the favorable opinion, dated as of
     Closing Time, of Latham & Watkins, special counsel for the Underwriters,
     together with signed or reproduced copies of such letter for each of the
     other Underwriters with respect to the matters set forth in clauses (i),
     (ii), (v), (vi) (solely as to preemptive or other similar rights arising by
     operation of law or under the charter or by-laws of the Company), (viii)
     through (x), inclusive, (xii), (xiv) (solely as to the information in the
     Prospectus under "Description of Capital Shares--Common Stock") and the
     penultimate paragraph of Exhibit A hereto. In giving such opinion such
     counsel may rely, as to all matters governed by the laws of jurisdictions
     other than the law of the State of New York and the federal law of the
     United States, upon the opinions of counsel satisfactory to the
     Representatives. Such counsel may also state that, insofar as such opinion
     involves factual matters, they have relied, to the extent they deem proper,
     upon certificates of officers of the Company and its subsidiaries and
     certificates of public officials.

          (e) Officers' Certificate. At Closing Time, there shall not have been,
     since the date hereof or since the respective dates as of which information
     is given in the Prospectus, any material adverse change in the condition,
     financial or otherwise, or in the earnings, business affairs or business
     prospects of the Company and its subsidiaries considered as one enterprise,
     whether or not arising in the ordinary course of business, and the
     Representatives shall have received a certificate of the President or a
     Vice President of the Company and of the chief financial or chief
     accounting officer of the Company, dated as of Closing Time, to the effect
     that (i) there has been no such material adverse change, (ii) the
     representations and warranties in Section 1(a) hereof are true and correct
     with the same force and effect as though expressly made at and as of
     Closing Time, (iii) the Company has complied with all agreements and
     satisfied all conditions on its part to be performed or satisfied at or
     prior to Closing Time, and (iv) no stop


                                       18
<PAGE>

     order suspending the effectiveness of the Registration Statement has been
     issued and no proceedings for that purpose have been instituted or are
     pending or are contemplated by the Commission.

          (f) Certificate of Selling Shareholders. At Closing Time, the
     Representatives shall have received a certificate of an Attorney-in-Fact on
     behalf of each Selling Shareholder, dated as of Closing Time, to the effect
     that (i) the representations and warranties of each Selling Shareholder
     contained in Section 1(b) hereof are true and correct in all respects with
     the same force and effect as though expressly made at and as of Closing
     Time and (ii) each Selling Shareholder has complied in all material
     respects with all agreements and all conditions on its part to be performed
     under this Agreement at or prior to Closing Time.

          (g) Accountant's Comfort Letter. At the time of the execution of this
     Agreement, the Representatives shall have received from KPMG LLP a letter
     dated such date, in form and substance satisfactory to the Representatives,
     together with signed or reproduced copies of such letter for each of the
     other Underwriters containing statements and information of the type
     ordinarily included in accountants' "comfort letters" to underwriters with
     respect to the financial statements and certain financial information
     contained in the Registration Statement and the Prospectus.

          (h) Bring-down Comfort Letter. At Closing Time, the Representatives
     shall have received from KPMG LLP a letter, dated as of Closing Time, to
     the effect that they reaffirm the statements made in the letter furnished
     pursuant to subsection (g) of this Section, except that the specified date
     referred to shall be a date not more than three business days prior to
     Closing Time.

          (i) Approval of Listing. At Closing Time, the Securities shall have
     been approved for inclusion in the Nasdaq National Market, subject only to
     official notice of issuance.

          (j) No Objection. The NASD has confirmed that it has not raised any
     objection with respect to the fairness and reasonableness of the
     underwriting terms and arrangements.

          (k) Lock-up Agreements. At the date of this Agreement, the
     Representatives shall have received an agreement substantially in the form
     of Exhibit C hereto signed by the persons listed on Schedule D hereto.

          (l) Conditions to Purchase of Option Securities. In the event that the
     Underwriters exercise their option provided in Section 2(b) hereof to
     purchase all or any portion of the Option Securities, the representations
     and warranties of the Company and the Selling Shareholders contained herein
     and the statements in any certificates furnished by the Company, any
     subsidiary of the Company and the Selling Shareholders hereunder shall be
     true and correct as of each Date of Delivery and, at the relevant Date of
     Delivery, the Representatives shall have received:

               (i) Officers' Certificate. A certificate, dated such Date of
          Delivery, of the President or a Vice President of the Company and of
          the chief financial or chief accounting officer of the Company
          confirming that the certificate delivered at the Closing


                                       19
<PAGE>

          Time pursuant to Section 5(e) hereof remains true and correct as of
          such Date of Delivery.

               (ii) Certificate of WCB. A certificate, dated such Date of
          Delivery, of an Attorney-in-Fact on behalf of WCB confirming that the
          certificate delivered at Closing Time pursuant to Section 5(f) remains
          true and correct as of such Date of Delivery.

               (iii) Opinion of Counsel for Company. The favorable opinion of
          Dorsey & Whitney, counsel for the Company, in form and substance
          satisfactory to counsel for the Underwriters, dated such Date of
          Delivery, relating to the Option Securities to be purchased on such
          Date of Delivery and otherwise to the same effect as the opinion
          required by Section 5(b) hereof.

               (iv) Opinion of Counsel for WCB. The favorable opinion of <M104>,
          counsel for WCB, in form and substance satisfactory to counsel for the
          Underwriters, dated such Date of Delivery, relating to the Option
          Securities to be purchased on such Date of Delivery and otherwise to
          the same effect as the opinion required by Section 5(c) hereof.

               (v) Opinion of Counsel for Underwriters. The favorable opinion of
          Latham & Watkins, counsel for the Underwriters, dated such Date of
          Delivery, relating to the Option Securities to be purchased on such
          Date of Delivery and otherwise to the same effect as the opinion
          required by Section 5(d) hereof.

               (vi) Bring-down Comfort Letter. A letter from KPMG LLP, in form
          and substance satisfactory to the Representatives and dated such Date
          of Delivery, substantially in the same form and substance as the
          letter furnished to the Representatives pursuant to Section 5(g)
          hereof, except that the "specified date" in the letter furnished
          pursuant to this paragraph shall be a date not more than five days
          prior to such Date of Delivery.

          (m) Additional Documents. At Closing Time and at each Date of Delivery
     counsel for the Underwriters shall have been furnished with such documents
     and opinions as they may require for the purpose of enabling them to pass
     upon the issuance and sale of the Securities as herein contemplated, or in
     order to evidence the accuracy of any of the representations or warranties,
     or the fulfillment of any of the conditions, herein contained; and all
     proceedings taken by the Company and the Selling Shareholders in connection
     with the issuance and sale of the Securities as herein contemplated shall
     be satisfactory in form and substance to the Representatives and counsel
     for the Underwriters.

          (n) Termination of Agreement. If any condition specified in this
     Section shall not have been fulfilled when and as required to be fulfilled,
     this Agreement, or, in the case of any condition to the purchase of Option
     Securities on a Date of Delivery which is after the Closing Time, the
     obligations of the several Underwriters to purchase the relevant Option
     Securities, may be terminated by the Representatives by notice to the
     Company at any time at or prior to Closing Time or such Date of Delivery,
     as the case may be, and such termination shall be without liability


                                       20
<PAGE>

     of any party to any other party except as provided in Section 4 and except
     that Sections 1, 6, 7 and 8 shall survive any such termination and remain
     in full force and effect.

     SECTION 6. Indemnification.

          (a) Indemnification of Underwriters. The Company and the Selling
     Shareholders, jointly and severally, agree to indemnify and hold harmless
     each Underwriter and each person, if any, who controls any Underwriter
     within the meaning of Section 15 of the 1933 Act or Section 20 of the 1934
     Act as follows:

               (i) against any and all loss, liability, claim, damage and
          expense whatsoever, as incurred, arising out of any untrue statement
          or alleged untrue statement of a material fact contained in the
          Registration Statement (or any amendment thereto), including the Rule
          430A Information and the Rule 434 Information, if applicable, or the
          omission or alleged omission therefrom of a material fact required to
          be stated therein or necessary to make the statements therein not
          misleading or arising out of any untrue statement or alleged untrue
          statement of a material fact included in any preliminary prospectus or
          the Prospectus (or any amendment or supplement thereto), or the
          omission or alleged omission therefrom of a material fact necessary in
          order to make the statements therein, in the light of the
          circumstances under which they were made, not misleading;

               (ii) against any and all loss, liability, claim, damage and
          expense whatsoever, as incurred, arising out of (A) the violation of
          any applicable laws or regulations of foreign jurisdictions where
          Reserved Securities have been offered and (B) any untrue statement or
          alleged untrue statement of a material fact included in the supplement
          or prospectus wrapper material distributed in [Insert Applicable
          Jurisdiction(s)] in connection with the reservation and sale of the
          Reserved Securities to persons having business relationships with the
          Company or the omission or alleged omission therefrom of a material
          fact necessary to make the statements therein, when considered in
          conjunction with the Prospectus or preliminary prospectus, not
          misleading;

               (iii) against any and all loss, liability, claim, damage and
          expense whatsoever, as incurred, to the extent of the aggregate amount
          paid in settlement of any litigation, or any investigation or
          proceeding by any governmental agency or body, commenced or
          threatened, or of any claim whatsoever based upon any such untrue
          statement or omission, or any such alleged untrue statement or
          omission or in connection with any violation of the nature referred to
          in Section 6(a)(ii)(A) hereof; provided that (subject to Section 6(d)
          below) any such settlement is effected with the written consent of the
          Company and the Selling Shareholders; and

               (iv) against any and all expense whatsoever, as incurred
          (including the fees and disbursements of counsel chosen by Merrill
          Lynch), reasonably incurred in investigating, preparing or defending
          against any litigation, or any investigation or proceeding by any
          governmental agency or body, commenced or threatened, or any claim
          whatsoever based upon any such untrue statement or omission, or any
          such alleged untrue statement or omission or in connection with any
          violation of the nature referred to in Section


                                       21
<PAGE>

          6(a)(ii)(A) hereof, to the extent that any such expense is not paid
          under (i), (ii) or (iii) above;

          provided, however, that this indemnity agreement shall not apply to
          any loss, liability, claim, damage or expense to the extent arising
          out of any untrue statement or omission or alleged untrue statement or
          omission made in reliance upon and in conformity with written
          information furnished to the Company by any Underwriter through
          Merrill Lynch expressly for use in the Registration Statement (or any
          amendment thereto), including the Rule 430A Information and the Rule
          434 Information, if applicable, or any preliminary prospectus or the
          Prospectus (or any amendment or supplement thereto); provided,
          further, that the Plan shall only be liable under this Section 6(a)
          with respect to (A) information pertaining to the Plan furnished by or
          on behalf of the Plan expressly for use in the Registration Statement
          (or any amendment thereto), including the Rule 430A Information and
          the Rule 434 Information, if applicable, or any preliminary prospectus
          or the Prospectus (or any amendment or supplement thereto) or (B)
          facts that would constitute a breach of any representation or warranty
          of the Plan set forth in Sections 1(b) or (c) hereof.

          (b) Indemnification of Company, Directors and Officers and Selling
     Shareholders. Each Underwriter severally agrees to indemnify and hold
     harmless the Company, its directors, each of its officers who signed the
     Registration Statement, and each person, if any, who controls the Company
     within the meaning of Section 15 of the 1933 Act or Section 20 of the 1934
     Act, and each Selling Shareholder and each person, if any, who controls
     such Selling Shareholder within the meaning of Section 15 of the 1933 Act
     or Section 20 of the 1934 Act against any and all loss, liability, claim,
     damage and expense described in the indemnity contained in subsection (a)
     of this Section, as incurred, but only with respect to untrue statements or
     omissions, or alleged untrue statements or omissions, made in the
     Registration Statement (or any amendment thereto), including the Rule 430A
     Information and the Rule 434 Information, if applicable, or any preliminary
     prospectus or the Prospectus (or any amendment or supplement thereto) in
     reliance upon and in conformity with written information furnished to the
     Company by such Underwriter through Merrill Lynch expressly for use in the
     Registration Statement (or any amendment thereto) or such preliminary
     prospectus or the Prospectus (or any amendment or supplement thereto).

          (c) Actions against Parties; Notification. Each indemnified party
     shall give notice as promptly as reasonably practicable to each
     indemnifying party of any action commenced against it in respect of which
     indemnity may be sought hereunder, but failure to so notify an indemnifying
     party shall not relieve such indemnifying party from any liability
     hereunder to the extent it is not materially prejudiced as a result thereof
     and in any event shall not relieve it from any liability which it may have
     otherwise than on account of this indemnity agreement. In the case of
     parties indemnified pursuant to Section 6(a) above, counsel to the
     indemnified parties shall be selected by Merrill Lynch, and, in the case of
     parties indemnified pursuant to Section 6(b) above, counsel to the
     indemnified parties shall be selected by the Company. An indemnifying party
     may participate at its own expense in the defense of any such action;
     provided, however, that counsel to the indemnifying party shall not (except
     with the consent of the indemnified party) also be counsel to the
     indemnified party. In no event shall the indemnifying parties be liable for
     fees and expenses of more than one counsel (in addition to any local
     counsel) separate from their own counsel for all indemnified parties in
     connection with any one action or separate but similar or related actions
     in the same jurisdiction arising out of the same general allegations or
     circumstances. No indemnifying party shall, without the prior written
     consent of the indemnified parties, settle or compromise or consent to the
     entry of any judgment with respect to any litigation, or any investigation
     or proceeding by any governmental agency or body, commenced or threatened,
     or any claim whatsoever in respect of which


                                       22
<PAGE>

     indemnification or contribution could be sought under this Section 6 or
     Section 7 hereof (whether or not the indemnified parties are actual or
     potential parties thereto), unless such settlement, compromise or consent
     (i) includes an unconditional release of each indemnified party from all
     liability arising out of such litigation, investigation, proceeding or
     claim and (ii) does not include a statement as to or an admission of fault,
     culpability or a failure to act by or on behalf of any indemnified party.

          (d) Settlement without Consent if Failure to Reimburse. If at any time
     an indemnified party shall have requested an indemnifying party to
     reimburse the indemnified party for fees and expenses of counsel, such
     indemnifying party agrees that it shall be liable for any settlement of the
     nature contemplated by Section 6(a)(ii) or Section 6(a)(iii) effected
     without its written consent if (i) such settlement is entered into more
     than 45 days after receipt by such indemnifying party of the aforesaid
     request, (ii) such indemnifying party shall have received notice of the
     terms of such settlement at least 30 days prior to such settlement being
     entered into and (iii) such indemnifying party shall not have reimbursed
     such indemnified party in accordance with such request prior to the date of
     such settlement.

          (e) Indemnification for Reserved Securities. In connection with the
     offer and sale of the Reserved Securities, the Company agrees, promptly
     upon a request in writing, to indemnify and hold harmless the Underwriters
     from and against any and all losses, liabilities, claims, damages and
     expenses incurred by them as a result of the failure of persons having
     business relationships with the Company to pay for and accept delivery of
     Reserved Securities which, by the end of the first business day following
     the date of this Agreement, were subject to a properly confirmed agreement
     to purchase.

          (f) Other Agreements with Respect to Indemnification. The provisions
     of this Section shall not affect any agreement among the Company and the
     Selling Shareholders with respect to indemnification.

     SECTION 7. Contribution. If the indemnification provided for in Section 6
hereof is for any reason unavailable to or insufficient to hold harmless an
indemnified party in respect of any losses, liabilities, claims, damages or
expenses referred to therein, then each indemnifying party shall contribute to
the aggregate amount of such losses, liabilities, claims, damages and expenses
incurred by such indemnified party, as incurred, (i) in such proportion as is
appropriate to reflect the relative benefits received by the Company and the
Selling Shareholders on the one hand and the Underwriters on the other hand from
the offering of the Securities pursuant to this Agreement or (ii) if the
allocation provided by clause (i) is not permitted by applicable law, in such
proportion as is appropriate to reflect not only the relative benefits referred
to in clause (i) above but also the relative fault of the Company and the
Selling Shareholders on the one hand and of the Underwriters on the other hand
in connection with the statements or omissions, or in connection with any
violation of the nature referred to in Section 6(a)(ii)(A) hereof, which
resulted in such losses, liabilities, claims, damages or expenses, as well as
any other relevant equitable considerations.

     The relative benefits received by the Company and the Selling Shareholders
on the one hand and the Underwriters on the other hand in connection with the
offering of the Securities


                                       23
<PAGE>

pursuant to this Agreement shall be deemed to be in the same respective
proportions as the total net proceeds from the offering of the Securities
pursuant to this Agreement (before deducting expenses) received by the Company
and the Selling Shareholders and the total underwriting discount received by the
Underwriters, in each case as set forth on the cover of the Prospectus, or, if
Rule 434 is used, the corresponding location on the Term Sheet bear to the
aggregate initial public offering price of the Securities as set forth on such
cover.

     The relative fault of the Company and the Selling Shareholders on the one
hand and the Underwriters on the other hand shall be determined by reference to,
among other things, whether any such untrue or alleged untrue statement of a
material fact or omission or alleged omission to state a material fact relates
to information supplied by the Company or the Selling Shareholders or by the
Underwriters and the parties' relative intent, knowledge, access to information
and opportunity to correct or prevent such statement or omission or any
violation of the nature referred to in Section 6(a)(ii)(A) hereof.

     The Company, the Selling Shareholders and the Underwriters agree that it
would not be just and equitable if contribution pursuant to this Section 7 were
determined by pro rata allocation (even if the Underwriters were treated as one
entity for such purpose) or by any other method of allocation which does not
take account of the equitable considerations referred to above in this Section
7. The aggregate amount of losses, liabilities, claims, damages and expenses
incurred by an indemnified party and referred to above in this Section 7 shall
be deemed to include any legal or other expenses reasonably incurred by such
indemnified party in investigating, preparing or defending against any
litigation, or any investigation or proceeding by any governmental agency or
body, commenced or threatened, or any claim whatsoever based upon any such
untrue or alleged untrue statement or omission or alleged omission.

     Notwithstanding the provisions of this Section 7, no Underwriter shall be
required to contribute any amount in excess of the amount by which the total
price at which the Securities underwritten by it and distributed to the public
were offered to the public exceeds the amount of any damages which such
Underwriter has otherwise been required to pay by reason of any such untrue or
alleged untrue statement or omission or alleged omission.

     No person guilty of fraudulent misrepresentation (within the meaning of
Section 11(f) of the 1933 Act) shall be entitled to contribution from any person
who was not guilty of such fraudulent misrepresentation.

     For purposes of this Section 7, each person, if any, who controls an
Underwriter within the meaning of Section 15 of the 1933 Act or Section 20 of
the 1934 Act shall have the same rights to contribution as such Underwriter, and
each director of the Company, each officer of the Company who signed the
Registration Statement, and each person, if any, who controls the Company or any
Selling Shareholder within the meaning of Section 15 of the 1933 Act or Section
20 of the 1934 Act shall have the same rights to contribution as the Company or
such Selling Shareholder, as the case may be. The Underwriters' respective
obligations to contribute pursuant to this Section 7 are several in proportion
to the number of Initial Securities set forth opposite their respective names in
Schedule A hereto and not joint.


                                       24
<PAGE>

     The provisions of this Section shall not affect any agreement among the
Company and the Selling Shareholders with respect to contribution.

     SECTION 8. Representations, Warranties and Agreements to Survive Delivery.
All representations, warranties and agreements contained in this Agreement or in
certificates of officers of the Company or any of its subsidiaries or the
Selling Shareholders submitted pursuant hereto, shall remain operative and in
full force and effect, regardless of any investigation made by or on behalf of
any Underwriter or controlling person, or by or on behalf of the Company or the
Selling Shareholders, and shall survive delivery of the Securities to the
Underwriters.

     SECTION 9. Termination of Agreement.

          (a) Termination; General. The Representatives may terminate this
     Agreement, by notice to the Company and the Selling Shareholders, at any
     time at or prior to Closing Time (i) if there has been, since the time of
     execution of this Agreement or since the respective dates as of which
     information is given in the Prospectus, any material adverse change in the
     condition, financial or otherwise, or in the earnings, business affairs or
     business prospects of the Company and its subsidiaries considered as one
     enterprise, whether or not arising in the ordinary course of business, or
     (ii) if there has occurred any material adverse change in the financial
     markets in the United States or the international financial markets, any
     outbreak of hostilities or escalation thereof or other calamity or crisis
     or any change or development involving a prospective change in national or
     international political, financial or economic conditions, in each case the
     effect of which is such as to make it, in the judgment of the
     Representatives, impracticable to market the Securities or to enforce
     contracts for the sale of the Securities, or (iii) if trading in any
     securities of the Company has been suspended or materially limited by the
     Commission or the Nasdaq National Market, or if trading generally on the
     American Stock Exchange or the New York Stock Exchange or in the Nasdaq
     National Market has been suspended or materially limited, or minimum or
     maximum prices for trading have been fixed, or maximum ranges for prices
     have been required, by any of said exchanges or by such system or by order
     of the Commission, the National Association of Securities Dealers, Inc. or
     any other governmental authority, or (iv) if a banking moratorium has been
     declared by either Federal, Minnesota or New York authorities.

          (b) Liabilities. If this Agreement is terminated pursuant to this
     Section, such termination shall be without liability of any party to any
     other party except as provided in Section 4 hereof, and provided further
     that Sections 1, 6, 7 and 8 shall survive such termination and remain in
     full force and effect.

     SECTION 10. Default by One or More of the Underwriters. If one or more of
the Underwriters shall fail at Closing Time or a Date of Delivery to purchase
the Securities which it or they are obligated to purchase under this Agreement
(the "Defaulted Securities"), the Representatives shall have the right, within
24 hours thereafter, to make arrangements for one or more of the non-defaulting
Underwriters, or any other underwriters, to purchase all, but not less than all,
of the Defaulted Securities in such amounts as may be agreed upon and upon the
terms herein set forth; if, however, the Representatives shall not have
completed such arrangements within such 24-hour period, then:


                                       25
<PAGE>

          (a) if the number of Defaulted Securities does not exceed 10% of the
     number of Securities to be purchased on such date, each of the
     non-defaulting Underwriters shall be obligated, severally and not jointly,
     to purchase the full amount thereof in the proportions that their
     respective underwriting obligations hereunder bear to the underwriting
     obligations of all non-defaulting Underwriters, or

          (b) if the number of Defaulted Securities exceeds 10% of the number of
     Securities to be purchased on such date, this Agreement or, with respect to
     any Date of Delivery which occurs after the Closing Time, the obligation of
     the Underwriters to purchase and of the Company to sell the Option
     Securities to be purchased and sold on such Date of Delivery shall
     terminate without liability on the part of any non-defaulting Underwriter.

     No action taken pursuant to this Section shall relieve any defaulting
Underwriter from liability in respect of its default.

     In the event of any such default which does not result in a termination of
this Agreement or, in the case of a Date of Delivery which is after the Closing
Time, which does not result in a termination of the obligation of the
Underwriters to purchase and the Company to sell the relevant Option Securities,
as the case may be, either the (i) Representatives or (ii) the Company and any
Selling Shareholder shall have the right to postpone Closing Time or the
relevant Date of Delivery, as the case may be, for a period not exceeding seven
days in order to effect any required changes in the Registration Statement or
Prospectus or in any other documents or arrangements. As used herein, the term
"Underwriter" includes any person substituted for an Underwriter under this
Section 10.

     SECTION 11. Default by one or more of the Selling Shareholders or the
Company.

          (a) If a Selling Shareholder shall fail at Closing Time or at a Date
     of Delivery to sell and deliver the number of Securities which such Selling
     Shareholder is obligated to sell hereunder, and the remaining Selling
     Shareholder does not exercise the right hereby granted to increase, pro
     rata or otherwise, the number of Securities to be sold by it hereunder to
     the total number to be sold by all Selling Shareholders as set forth in
     Schedule B hereto, then the Underwriters may, at option of the
     Representatives, by notice from the Representatives to the Company and the
     non-defaulting Selling Shareholders, either (a) terminate this Agreement
     without any liability on the fault of any non-defaulting party except that
     the provisions of Sections 1, 4, 6, 7 and 8 shall remain in full force and
     effect or (b) elect to purchase the Securities which the non-defaulting
     Selling Shareholders and the Company have agreed to sell hereunder. No
     action taken pursuant to this Section 11 shall relieve any Selling
     Shareholder so defaulting from liability, if any, in respect of such
     default.

          In the event of a default by any Selling Shareholder as referred to in
     this Section 11, each of the Representatives, the Company and the
     non-defaulting Selling Shareholder shall have the right to postpone Closing
     Time or Date of Delivery for a period not exceeding seven days in order to
     effect any required change in the Registration Statement or Prospectus or
     in any other documents or arrangements.


                                       26
<PAGE>

          (b) If the Company shall fail at Closing Time or at the Date of
     Delivery to sell the number of Securities that it is obligated to sell
     hereunder, then this Agreement shall terminate without any liability on the
     part of any nondefaulting party; provided, however, that the provisions of
     Sections 1, 4, 6, 7 and 8 shall remain in full force and effect. No action
     taken pursuant to this Section shall relieve the Company from liability, if
     any, in respect of such default.]

     SECTION 12. Notices. All notices and other communications hereunder shall
be in writing and shall be deemed to have been duly given if mailed or
transmitted by any standard form of telecommunication. Notices to the
Underwriters shall be directed to the Representatives at North Tower, World
Financial Center, New York, New York 10281-1201, attention of * ; notices to the
Company shall be directed to it at 3500 Lyman Boulevard, Chaska, Minnesota
55318; attention of James E. Dauwalter, and notices to the Plan shall be
directed to Entegris, Inc. Employee Stock Ownership Plan, 3500 Lyman Boulevard,
Chaska, Minnesota 55318; and notices to WCB shall be directed to it at 950 Lake
Drive, Chaska, Minnesota, 55317, attention of * .

     SECTION 13. Parties. This Agreement shall each inure to the benefit of and
be binding upon the Underwriters, the Company and the Selling Shareholders and
their respective successors. Nothing expressed or mentioned in this Agreement is
intended or shall be construed to give any person, firm or corporation, other
than the Underwriters, the Company and the Selling Shareholders and their
respective successors and the controlling persons and officers and directors
referred to in Sections 6 and 7 and their heirs and legal representatives, any
legal or equitable right, remedy or claim under or in respect of this Agreement
or any provision herein contained. This Agreement and all conditions and
provisions hereof are intended to be for the sole and exclusive benefit of the
Underwriters, the Company and the Selling Shareholders and their respective
successors, and said controlling persons and officers and directors and their
heirs and legal representatives, and for the benefit of no other person, firm or
corporation. No purchaser of Securities from any Underwriter shall be deemed to
be a successor by reason merely of such purchase.

     SECTION 14. GOVERNING LAW AND TIME. THIS AGREEMENT SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK. SPECIFIED TIMES
OF DAY REFER TO NEW YORK CITY TIME.

     SECTION 15. Effect of Headings. The Article and Section headings herein and
the Table of Contents are for convenience only and shall not affect the
construction hereof.


                                       27
<PAGE>

     If the foregoing is in accordance with your understanding of our agreement,
please sign and return to the Company and the Attorney-in-Fact for the Selling
Shareholders a counterpart hereof, whereupon this instrument, along with all
counterparts, will become a binding agreement among the Underwriters, the
Company and the Selling Shareholders in accordance with its terms.

                                       Very truly yours,

                                       ENTEGRIS, INC.


                                       By:
                                           -------------------------------------
                                       Title:

                                       WCB HOLDING LLC
                                       ENTEGRIS, INC. EMPLOYEE STOCK OWNERSHIP
                                       PLAN


                                       By:
                                           -------------------------------------
                                       Title:

                                       As Attorney-in-Fact acting on behalf of
                                       the Selling Shareholders named in
                                       Sechedule B hereto

CONFIRMED AND ACCEPTED, as of the date first above written:

MERRILL LYNCH & CO.
MERRILL LYNCH, PIERCE, FENNER & SMITH
INCORPORATED
donaldson, lufkin & jenrette securities corporation
SALOMON SMITH BARNEY INC.
U.S. BANCORP PIPER JAFFRAY INC.

By:      MERRILL LYNCH, PIERCE, FENNER & SMITH
         INCORPORATED


By
   -------------------------------
   Authorized Signatory

For themselves and as Representatives of the other Underwriters named in
Schedule A hereto.


                                      S-1
<PAGE>

                                   SCHEDULE A


                                                             Number of
                                                              Initial
Name of Underwriter                                          Securities
-------------------                                          ----------
Merrill Lynch, Pierce, Fenner & Smith
         Incorporated.....................................
Donaldson, Lufkin & Jenrette Securities Corporation.......
Salomon Smith Barney Inc..................................
U.S. Bancorp Piper Jaffray Inc............................
                                                             ----------
Total.....................................................   13,000,000


                                    Sch A-1
<PAGE>

                                   SCHEDULE B

                                                              Maximum Number of
                                         Number of Initial    Option Securities
                                       Securities to be Sold      to be Sold
                                       ---------------------      ----------
ENTEGRIS, INC.                               8,600,000             1,290,000
WCB HOLDING LLC                              1,925,000               660,000
ENTEGRIS, INC. EMPLOYEE STOCK
    OWNERSHIP PLAN                           2,475,000

Total..................................     13,000,000             1,950,000


                                    Sch B-1
<PAGE>

                                   SCHEDULE C

                                 ENTEGRIS, INC.
                            13,000,000 Common Shares
                           (Par Value $.01 Per Share)

     1. The initial public offering price per share for the Securities,
determined as provided in said Section 2, shall be $ * .

     2. The purchase price per share for the Securities to be paid by the
several Underwriters shall be $  * , being an amount equal to the initial public
offering price set forth above less $  *  per share; provided that the purchase
price per share for any Option Securities purchased upon the exercise of the
over-allotment option described in Section 2(b) shall be reduced by an amount
per share equal to any dividends or distributions declared by the Company and
payable on the Initial Securities but not payable on the Option Securities.


                                    Sch C-1
<PAGE>

                                   SCHEDULE D

James E. Dauwalter                                  Dorothy E. Revord Trust
Judith Dauwalter                                    Judith Ann Revord
Michael Dauwalter                                   Mary Evelyn Benson
David Dauwalter                                     Jean Marie Revord
Kathryn Dauwalter                                   Jay Bennett
Stan Geyer                                          Sarah Bennett
Beverly Geyer                                       Andrew Bennett
Christian Geyer                                     Thomas Bennett
Annie Geyer                                         Robert Bennett
Daniel R. Quernemoen                                Guy Milliren
June Quernemoen                                     Jacqueline Lee Milliren
Rebecca Johnson                                     Matthew D. Nielsen
Steven Quernemoen                                   T. Weldon Smith
Timothy Quernemoen                                  Al Henningsgaard
Delmer M. Jensen                                    John Goodman
John D. Villas                                      Wayne Holtmeier
Robert J. Boehlke                                   Frank Sidell
Roger D. McDaniel                                   Richard LaBute
Craig V. Wallestad & Nina F. Wallestad Trust        Wayne Zitzloff
Craig Wallestad Children Trust                      James Efferz
Jan W. Wright                                       Lowell Wolter
Timothy Wright                                      Marubeni Corporation
Richard G. Revord Trust                             Marubeni America Corporation


                                    Sch D-1
<PAGE>

                                                                       Exhibit A

                      FORM OF OPINION OF COMPANY'S COUNSEL
                           TO BE DELIVERED PURSUANT TO
                                  SECTION 5(b)

     (i) The Company has been duly incorporated and is validly existing as a
corporation in good standing under the laws of the State of Minnesota.

     (ii) The Company has corporate power and authority to own, lease and
operate its properties and to conduct its business as described in the
Prospectus and to enter into and perform its obligations under the Purchase
Agreement.

     (iii) The Company is duly qualified as a foreign corporation to transact
business and is in good standing in each jurisdiction in which such
qualification is required, whether by reason of the ownership or leasing of
property or the conduct of business, except where the failure so to qualify or
to be in good standing would not result in a Material Adverse Effect.

     (iv) The authorized, issued and outstanding capital stock of the Company is
as set forth in the Prospectus in the column entitled "Actual" under the caption
"Capitalization" (except for subsequent issuances, if any, pursuant to the
Purchase Agreement or pursuant to reservations, agreements or employee benefit
plans referred to in the Prospectus or pursuant to the exercise of convertible
securities or options referred to in the Prospectus); the shares of issued and
outstanding capital stock of the Company, including the Securities to be
purchased by the Underwriters from the Selling Shareholders, have been duly
authorized and validly issued and are fully paid and non-assessable; and none of
the outstanding shares of capital stock of the Company was issued in violation
of the preemptive or other similar rights of any securityholder of the Company.

     (v) The Securities to be purchased by the Underwriters from the Company
have been duly authorized for issuance and sale to the Underwriters pursuant to
the Purchase Agreement and, when issued and delivered by the Company pursuant to
the Purchase Agreement against payment of the consideration set forth in the
Purchase Agreement, will be validly issued and fully paid and non-assessable and
no holder of the Securities is or will be subject to personal liability by
reason of being such a holder.

     (vi) The issuance and sale of the Securities by the Company and the sale of
the Securities by the Selling Shareholders is not subject to the preemptive or
other similar rights of any securityholder of the Company.

     (vii) Each Subsidiary has been duly incorporated and is validly existing as
a corporation in good standing under the laws of the jurisdiction of its
incorporation, has corporate power and authority to own, lease and operate its
properties and to conduct its business as described in the Prospectus and is
duly qualified as a foreign corporation to transact business and is in good
standing in each jurisdiction in which such qualification is required, whether
by reason


                                    Exh A-1
<PAGE>

of the ownership or leasing of property or the conduct of business, except where
the failure so to qualify or to be in good standing would not result in a
Material Adverse Effect; except as otherwise disclosed in the Registration
Statement, all of the issued and outstanding capital stock of each Subsidiary
has been duly authorized and validly issued, is fully paid and non-assessable
and, to the best of our knowledge, is owned by the Company, directly or through
subsidiaries, free and clear of any security interest, mortgage, pledge, lien,
encumbrance, claim or equity; none of the outstanding shares of capital stock of
any Subsidiary was issued in violation of the preemptive or similar rights of
any securityholder of such Subsidiary.

     (viii) The Purchase Agreement has been duly authorized, executed and
delivered by the Company.

     (ix) The Registration Statement, including any Rule 462(b) Registration
Statement, has been declared effective under the 1933 Act; any required filing
of the Prospectus pursuant to Rule 424(b) has been made in the manner and within
the time period required by Rule 424(b); and, to the best of our knowledge, no
stop order suspending the effectiveness of the Registration Statement or any
Rule 462(b) Registration Statement has been issued under the 1933 Act and no
proceedings for that purpose have been instituted or are pending or threatened
by the Commission.

     (x) The Registration Statement, including any Rule 462(b) Registration
Statement, the Rule 430A Information and the Rule 434 Information, as
applicable, the Prospectus, and each amendment or supplement to the Registration
Statement and Prospectus, as of their respective effective or issue dates (other
than the financial statements and supporting schedules included therein or
omitted therefrom, as to which we need express no opinion) complied as to form
in all material respects with the requirements of the 1933 Act and the 1933 Act
Regulations.

     (xi) If Rule 434 has been relied upon, the Prospectus was not "materially
different," as such term is used in Rule 434, from the prospectus included in
the Registration Statement at the time it became effective.

     (xii) The form of certificate used to evidence the Common Shares complies
in all material respects with all applicable statutory requirements, with any
applicable requirements of the charter and by-laws of the Company and the
requirements of the Nasdaq National Market.

     (xiii) To the best of our knowledge, there is not pending or threatened any
action, suit, proceeding, inquiry or investigation, to which the Company or any
subsidiary is a party, or to which the property of the Company or any subsidiary
is subject, before or brought by any court or governmental agency or body,
domestic or foreign, which might reasonably be expected to result in a Material
Adverse Effect, or which might reasonably be expected to materially and
adversely affect the properties or assets thereof or the consummation of the
transactions contemplated in the Purchase Agreement or the performance by the
Company of its obligations thereunder.

     (xiv) The information in the Prospectus under "Description of Capital
Shares --Common Stock", "Business--Facilities", "Business--Legal Proceedings",
"Business--Patents and Proprietary Rights", "Description of Capital
Shares--Options and Warrants", "Certain


                                    Exh A-2
<PAGE>

Federal Income Tax Considerations", the last two paragraphs under
"Business--Markets and Products" and in the Registration Statement under Item 14
and Item 15, to the extent that it constitutes matters of law, summaries of
legal matters, the Company's charter and bylaws or legal proceedings, or legal
conclusions, has been reviewed by us and is correct in all material respects.

     (xv) To the best of our knowledge, there are no statutes or regulations
that are required to be described in the Prospectus that are not described as
required.

     (xvi) All descriptions in the Registration Statement of contracts and other
documents to which the Company or its subsidiaries are a party are accurate in
all material respects; to the best of our knowledge, there are no franchises,
contracts, indentures, mortgages, loan agreements, notes, leases or other
instruments required to be described or referred to in the Registration
Statement or to be filed as exhibits thereto other than those described or
referred to therein or filed or incorporated by reference as exhibits thereto,
and the descriptions thereof or references thereto are correct in all material
respects.

     (xvii) To the best of our knowledge, neither the Company nor any subsidiary
is in violation of its charter or by-laws and no default by the Company or any
subsidiary exists in the due performance or observance of any material
obligation, agreement, covenant or condition contained in any contract,
indenture, mortgage, loan agreement, note, lease or other agreement or
instrument that is described or referred to in the Registration Statement or the
Prospectus or filed or incorporated by reference as an exhibit to the
Registration Statement.

     (xviii) No filing with, or authorization, approval, consent, license,
order, registration, qualification or decree of, any court or governmental
authority or agency, domestic or foreign (other than under the 1933 Act and the
1933 Act Regulations, which have been obtained, or as may be required under the
securities or blue sky laws of the various states, as to which we need express
no opinion) is necessary or required in connection with the due authorization,
execution and delivery of the Purchase Agreement or for the offering, issuance,
sale or delivery of the Securities.

     (xix) The execution, delivery and performance of the Purchase Agreement and
the consummation of the transactions contemplated in the Purchase Agreement and
in the Registration Statement (including the issuance and sale of the Securities
and the use of the proceeds from the sale of the Securities as described in the
Prospectus under the caption "Use Of Proceeds") and compliance by the Company
with its obligations under the Purchase Agreement do not and will not, whether
with or without the giving of notice or lapse of time or both, conflict with or
constitute a breach of, or default or Repayment Event (as defined in Section
1(a)(x) of the Purchase Agreement) under or result in the creation or imposition
of any lien, charge or encumbrance upon any property or assets of the Company or
any subsidiary pursuant to any contract, indenture, mortgage, deed of trust,
loan or credit agreement, note, lease or any other agreement or instrument,
known to us, to which the Company or any subsidiary is a party or by which it or
any of them may be bound, or to which any of the property or assets of the
Company or any subsidiary is subject (except for such conflicts, breaches or
defaults or liens, charges or encumbrances that would not have a Material
Adverse Effect), nor will such action result in any


                                    Exh A-3
<PAGE>

violation of the provisions of the charter or by-laws of the Company or any
subsidiary, or any applicable law, statute, rule, regulation, judgment, order,
writ or decree, known to us, of any government, government instrumentality or
court, domestic or foreign, having jurisdiction over the Company or any
subsidiary or any of their respective properties, assets or operations.

     (xx) To the best of our knowledge, there are no persons with registration
rights or other similar rights to have any securities registered pursuant to the
Registration Statement or otherwise registered by the Company under the 1933
Act.

     (xxi) The Company is not an "investment company" or an entity "controlled"
by an "investment company," as such terms are defined in the 1940 Act.

     Nothing has come to our attention that would lead us to believe that the
Registration Statement or any amendment thereto, including the Rule 430A
Information and Rule 434 Information (if applicable), (except for financial
statements and schedules and other financial data included therein or omitted
therefrom, as to which we need make no statement), at the time such Registration
Statement or any such amendment became effective, contained an untrue statement
of a material fact or omitted to state a material fact required to be stated
therein or necessary to make the statements therein not misleading or that the
Prospectus or any amendment or supplement thereto (except for financial
statements and schedules and other financial data included therein or omitted
therefrom, as to which we need make no statement), at the time the Prospectus
was issued, at the time any such amended or supplemented prospectus was issued
or at the Closing Time, included or includes an untrue statement of a material
fact or omitted or omits to state a material fact necessary in order to make the
statements therein, in the light of the circumstances under which they were
made, not misleading.

     In rendering such opinion, such counsel may rely, as to matters of fact
(but not as to legal conclusions), to the extent they deem proper, on
certificates of responsible officers of the Company and public officials. Such
opinion shall not state that it is to be governed or qualified by, or that it is
otherwise subject to, any treatise, written policy or other document relating to
legal opinions, including, without limitation, the Legal Opinion Accord of the
ABA Section of Business Law (1991).


                                    Exh A-4
<PAGE>

                                                                       Exhibit B

             FORM OF OPINION OF COUNSEL FOR THE SELLING SHAREHOLDERS
                    TO BE DELIVERED PURSUANT TO SECTION 5(c)

     (i) No filing with, or consent, approval, authorization, license, order,
registration, qualification or decree of, any court or governmental authority or
agency, domestic or foreign, (other than the issuance of the order of the
Commission declaring the Registration Statement effective and such
authorizations, approvals or consents as may be necessary under state securities
laws, as to which we need express no opinion) is necessary or required to be
obtained by the Selling Shareholders for the performance by each Selling
Shareholder of its obligations under the Purchase Agreement or in the Power of
Attorney and Custody Agreement, or in connection with the offer, sale or
delivery of the Securities.

     (ii) Each Power of Attorney and Custody Agreement has been duly executed
and delivered by the respective Selling Shareholders named therein and
constitutes the legal, valid and binding agreement of such Selling Shareholder.

     (iii) The Purchase Agreement has been duly authorized, executed and
delivered by or on behalf of each Selling Shareholder.

     (iv) Each Attorney-in-Fact has been duly authorized by the Selling
Shareholders to deliver the Securities on behalf of such Selling Shareholders in
accordance with the terms of the Purchase Agreement.

     (v) The execution, delivery and performance of the Purchase Agreement and
the Power of Attorney and Custody Agreement and the sale and delivery of the
Securities and the consummation of the transactions contemplated in the Purchase
Agreement and in the Registration Statement and compliance by the Selling
Shareholders with its obligations under the Purchase Agreement have been duly
authorized by all necessary action on the part of the Selling Shareholders and
do not and will not, whether with or without the giving of notice or passage of
time or both, conflict with or constitute a breach of, or default under or
result in the creation or imposition of any tax, lien, charge or encumbrance
upon the Securities or any property or assets of the Selling Shareholders
pursuant to, any contract, indenture, mortgage, deed of trust, loan or credit
agreement, note, license, lease or other instrument or agreement to which any
Selling Shareholder is a party or by which they may be bound, or to which any of
the property or assets of the Selling Shareholders may be subject nor will such
action result in any violation of the provisions of the charter or by-laws of
the Selling Shareholders, if applicable, or any law, administrative regulation,
judgment or order of any governmental agency or body or any administrative or
court decree having jurisdiction over such Selling Shareholder or any of its
properties.

     (vi) To the best of our knowledge, each Selling Shareholder has valid and
marketable title to the Securities to be sold by such Selling Shareholder
pursuant to the Purchase Agreement, free and clear of any pledge, lien, security
interest, charge, claim, equity or encumbrance of any kind, and has full right,
power and authority to sell, transfer and deliver such Securities pursuant


                                    Exh B-1
<PAGE>

to the Purchase Agreement. By delivery of a certificate or certificates therefor
such Selling Shareholder will transfer to the Underwriters who have purchased
such Securities pursuant to the Purchase Agreement (without notice of any defect
in the title of such Selling Shareholder and who are otherwise bona fide
purchasers for purposes of the Uniform Commercial Code) valid and marketable
title to such Securities, free and clear of any pledge, lien, security interest,
charge, claim, equity or encumbrance of any kind.

     Nothing has come to our attention that would lead us to believe that the
Registration Statement or any amendment thereto, including the Rule 430A
Information and Rule 434 Information (if applicable), (except for financial
statements and schedules and other financial data included therein or omitted
therefrom, as to which we need make no statement), at the time such Registration
Statement or any such amendment became effective, contained an untrue statement
of a material fact or omitted to state a material fact required to be stated
therein or necessary to make the statements therein not misleading or that the
Prospectus or any amendment or supplement thereto (except for financial
statements and schedules and other financial data included therein or omitted
therefrom, as to which we need make no statement), at the time the Prospectus
was issued, at the time any such amended or supplemented prospectus was issued
or at the Closing Time, included or includes an untrue statement of a material
fact or omitted or omits to state a material fact necessary in order to make the
statements therein, in the light of the circumstances under which they were
made, not misleading.


                                    Exh B-2
<PAGE>

                                                                       Exhibit C


  *   [2,000]

MERRILL LYNCH & CO.
Merrill Lynch, Pierce, Fenner & Smith
Incorporated,
Donaldson, Lufkin & Securities Corporation
Salomon Smith Barney Inc.
U.S. Bancorp Piper Jaffray Inc.
   as Representatives of the several
   Underwriters to be named in the
   within-mentioned Purchase Agreement
c/o  Merrill Lynch & Co.
Merrill Lynch, Pierce, Fenner & Smith
Incorporated
North Tower
World Financial Center
New York, New York  10281-1209

     Re:  Proposed Public Offering by Entegris, Inc.
          ------------------------------------------

Dear Sirs:

     The undersigned, a stockholder [and an officer and/or director] of
Entegris, Inc., a Minnesota corporation (the "Company"), understands that
Merrill Lynch & Co., Merrill Lynch, Pierce, Fenner & Smith Incorporated
("Merrill Lynch") and Donaldson, Lufkin & Securities Corporation, Salomon Smith
Barney Inc. and U.S. Bancorp Piper Jaffray Inc. propose(s) to enter into a
Purchase Agreement (the "Purchase Agreement") with the Company and the Selling
Shareholders providing for the public offering of shares (the "Securities") of
the Company's common shares, par value $.01 per share (the "Common Shares"). In
recognition of the benefit that such an offering will confer upon the
undersigned as a stockholder [and an officer and/or director] of the Company,
and for other good and valuable consideration, the receipt and sufficiency of
which are hereby acknowledged, the undersigned agrees with each underwriter to
be named in the Purchase Agreement that, during a period of ? days from the date
of the Purchase Agreement, the undersigned will not, without the prior written
consent of Merrill Lynch, directly or indirectly, (i) offer, pledge, sell,
contract to sell, sell any option or contract to purchase, purchase any option
or contract to sell, grant any option, right or warrant for the sale of, or
otherwise dispose of or transfer any shares of the Company's Common Shares or
any securities convertible into or exchangeable or exercisable for Common
Shares, whether now owned or hereafter acquired by the undersigned or with
respect to which the undersigned has or hereafter acquires the power of
disposition, or file any registration statement under the Securities Act of
1933, as amended, with respect to any of the foregoing or (ii) enter into any
swap or any other agreement or any transaction that transfers, in whole or in
part, directly or indirectly, the


                                    Exh C-1
<PAGE>

economic consequence of ownership of the Common Shares, whether any such swap or
transaction is to be settled by delivery of Common Shares or other securities,
in cash or otherwise.

                                       Very truly yours,


                                       Signature:
                                       Print Name:


                                    Exh C-2


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