<ARTICLE> 5 <MULTIPLIER> 1,000 <CURRENCY> U.S. DOLLARS <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-START> JAN-01-1998 <PERIOD-END> JUN-30-1998 <EXCHANGE-RATE> 1 <CASH> 16,972 <SECURITIES> 0 <RECEIVABLES> 52,502 <ALLOWANCES> 110 <INVENTORY> 51,932 <CURRENT-ASSETS> 125,291 <PP&E> 95,236 <DEPRECIATION> 45,407 <TOTAL-ASSETS> 233,738 <CURRENT-LIABILITIES> 40,158 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 39,839 <OTHER-SE> 153,741 <TOTAL-LIABILITY-AND-EQUITY> 233,738 <SALES> 95,382 <TOTAL-REVENUES> 95,382 <CGS> 41,824 <TOTAL-COSTS> 41,824 <OTHER-EXPENSES> 40,350 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 13,208 <INCOME-TAX> 3,910 <INCOME-CONTINUING> 9,298 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 9,298 <EPS-PRIMARY> .68 <EPS-DILUTED> .67