<ARTICLE> 5
<MULTIPLIER> 1,000
<RESTATED>
       
                                                                       
<PERIOD-TYPE>                   9-MOS                   6-MOS                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997             DEC-31-1997
<PERIOD-START>                             JAN-01-1997             JAN-01-1997             JAN-01-1997
<PERIOD-END>                               SEP-30-1997             JUN-30-1997             MAR-31-1997
<CASH>                                           2,535                   1,428                     266
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                   45,588                  37,306                  34,614
<ALLOWANCES>                                   (1,565)                 (1,665)                 (1,666)
<INVENTORY>                                     34,130                  33,854                  33,982
<CURRENT-ASSETS>                                81,939                  72,241                  68,652
<PP&E>                                          18,860                  16,688                  15,123
<DEPRECIATION>                                 (8,492)                 (7,784)                 (7,239)
<TOTAL-ASSETS>                                  96,348                  85,170                  80,447
<CURRENT-LIABILITIES>                           35,720                  27,215                  25,067
<BONDS>                                          5,477                   5,501                   4,843
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                            56                      55                      55
<OTHER-SE>                                      55,095                  52,399                  50,482
<TOTAL-LIABILITY-AND-EQUITY>                    96,348                  85,170                  80,447
<SALES>                                         59,675                  35,760                  15,821
<TOTAL-REVENUES>                                59,675                  35,760                  15,821
<CGS>                                           27,654                  16,524                   7,529
<TOTAL-COSTS>                                   27,654                  16,524                   7,529
<OTHER-EXPENSES>                                25,421                  16,304                   7,863
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                               1,353                     852                     306
<INCOME-PRETAX>                                  5,247                   2,080                     123
<INCOME-TAX>                                     1,269                     539                      32
<INCOME-CONTINUING>                              3,978                   1,541                      91
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                     3,978                   1,541                      91
<EPS-PRIMARY>                                     0.73                    0.28                    0.02
<EPS-DILUTED>                                     0.68                    0.27                    0.02