... features :1. Several material f or Oil Seal, O-Ring and rubber gasket like: NBR, HNBR, CR, PDFE, EPDM, SILICONE, VITONE, etc ... . Optional color for you of the Oil Seal, O-Ring and rubber gasket: Black, red, yellow, brown, white, green, violet etc, can ... the high quality but low price of Oil Seal, O-Ring, Rubber seal, Rubber gasket, Rubber ring, Sealing ring, Sealing gasket. 100% silicon seal / o ...