... -Ring: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 ... -grain seal, solicone sheet3)EPDM products:foam or close-grain products, slot articles, seal for windows and doors, cars Silicone Rubber O Rings