<ARTICLE> 5 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> MAR-31-1997 <PERIOD-START> JUL-01-1997 <PERIOD-END> SEP-30-1997 <CASH> 7,329,414 <SECURITIES> 0 <RECEIVABLES> 13,934,968 <ALLOWANCES> 477,624 <INVENTORY> 14,667,945 <CURRENT-ASSETS> 36,409,951 <PP&E> 23,594,322 <DEPRECIATION> 14,620,088 <TOTAL-ASSETS> 53,914,024 <CURRENT-LIABILITIES> 9,278,365 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 1,164,490 <OTHER-SE> 43,471,169 <TOTAL-LIABILITY-AND-EQUITY> 53,914,024 <SALES> 20,685,942 <TOTAL-REVENUES> 20,685,942 <CGS> 9,015,870 <TOTAL-COSTS> 9,136,839 <OTHER-EXPENSES> (190,383) <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 2,723,616 <INCOME-TAX> 953,000 <INCOME-CONTINUING> 1,770,616 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 1,770,616 <EPS-PRIMARY> .15 <EPS-DILUTED> .15