<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-START> JAN-01-1999 <PERIOD-END> SEP-30-1999 <CASH> 14,589 <SECURITIES> 0 <RECEIVABLES> 55,869 <ALLOWANCES> 141 <INVENTORY> 56,187 <CURRENT-ASSETS> 130,519 <PP&E> 108,024 <DEPRECIATION> 54,803 <TOTAL-ASSETS> 247,596 <CURRENT-LIABILITIES> 44,057 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 37,720 <OTHER-SE> 165,819 <TOTAL-LIABILITY-AND-EQUITY> 247,596 <SALES> 158,752 <TOTAL-REVENUES> 158,752 <CGS> 72,011 <TOTAL-COSTS> 72,011 <OTHER-EXPENSES> 66,658 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 20,083 <INCOME-TAX> 5,680 <INCOME-CONTINUING> 14,403 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 14,403 <EPS-BASIC> 1.05 <EPS-DILUTED> 1.05