Current Test-by-Test Standard Deviations

                                       Within                    Total
                                          Lab    Overall      Individual
Elastomer               Parameter         STD      STD      Determinations

HYDROGENATED NITRILE    Volume           0.66       0.64          23      
HYDROGENATED NITRILE    Hardness         1.19       1.14          23      
HYDROGENATED NITRILE    Tension         14.25      13.71          23      
HYDROGENATED NITRILE    Elongation      12.61      12.46          23