3.2.2 Material Surface Finish 3 . 2 . 2 M a t e r i a l S u r f a c e F i n i s h E l a s t o m e r - S t y r e n e B u ta d i e n e R u bb e r E m m a H o l d en Emma Holden Elastomer - Styrene Butadiene Rubber C00216381 C0 0 2 1 63 8 1