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                                                                   EXHIBIT 10.22



                                 MICAFIL, INC.



1. "Profit" for purposes of this Plan supplement shall be defined as pretax
   profit of Micafil, before corporate administrative charges and before bonus
   payments.  Twelve and one-half percent (12.5%) of the profit shall be paid
   in cash bonus to the employees of Micafil based upon the following
   distribution:

        25% to key employees - Maximum of 3 people in this category;

        25% to key managers - which shall be limited to a maximum of 7 people;
        and

        50% to all salaried employees.

2. For every $100,000 of Profit, stock options for 10,000 shares of Centrum
   stock shall be set aside for management of Micafil.  The stock options shall
   be at market as of the close of business on the last day of Centrum's fiscal
   year.  The options shall be valid for a 10-year period and be subject to the
   detailed provisions of Centrum's stock option agreement.  The options shall
   be distributed as follows:

        60% to "key employees" as described in Section 1 of this Plan 
        supplement; and

        40% to "key managers", which shall be limited to a maximum of 7 people.

  Through fiscal year ended 3/31/96