<ARTICLE> 5 <MULTIPLIER> 1,000 <CURRENCY> U.S. DOLLARS <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-START> JAN-01-1998 <PERIOD-END> SEP-30-1998 <EXCHANGE-RATE> 1 <CASH> 20,247 <SECURITIES> 0 <RECEIVABLES> 52,787 <ALLOWANCES> 118 <INVENTORY> 53,639 <CURRENT-ASSETS> 130,488 <PP&E> 100,683 <DEPRECIATION> 48,065 <TOTAL-ASSETS> 245,306 <CURRENT-LIABILITIES> 45,880 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 40,190 <OTHER-SE> 159,236 <TOTAL-LIABILITY-AND-EQUITY> 245,306 <SALES> 144,155 <TOTAL-REVENUES> 144,155 <CGS> 63,278 <TOTAL-COSTS> 63,278 <OTHER-EXPENSES> 60,184 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 20,693 <INCOME-TAX> 6,000 <INCOME-CONTINUING> 14,693 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 14,693 <EPS-PRIMARY> 1.07 <EPS-DILUTED> 1.06