<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-START> JAN-01-1999 <PERIOD-END> JUN-30-1999 <CASH> 11,275 <SECURITIES> 0 <RECEIVABLES> 55,758 <ALLOWANCES> 126 <INVENTORY> 55,443 <CURRENT-ASSETS> 126,359 <PP&E> 104,301 <DEPRECIATION> 52,067 <TOTAL-ASSETS> 239,716 <CURRENT-LIABILITIES> 40,567 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 37,670 <OTHER-SE> 161,479 <TOTAL-LIABILITY-AND-EQUITY> 239,716 <SALES> 105,059 <TOTAL-REVENUES> 105,059 <CGS> 47,366 <TOTAL-COSTS> 47,366 <OTHER-EXPENSES> 44,141 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 13,552 <INCOME-TAX> 3,940 <INCOME-CONTINUING> 9,612 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 9,612 <EPS-BASIC> 0.70 <EPS-DILUTED> 0.70