Current Test-by-Test Standard Deviations

                                       Within                    Total
                                          Lab    Overall      Individual
Elastomer               Parameter         STD      STD      Determinations

VAMAC                   Volume           1.82       1.95         10674    
VAMAC                   Hardness         1.69       1.75         10654    
VAMAC                   Tension          6.45       6.50         10654    
VAMAC                   Elongation       9.80      10.16         10665