... O-Rings are made according to international standard.*ISO3601 *AS568A *DIN3771 *BS1806All material are RoHS compliantSome compounds meet USA-FDA/NSF, England ... color for you of the oil seal, O-Ring and rubber gasket: Black, red, yellow, brown, ... O-Ring , Rubber seal, Rubber gasket, Rubber ring, Sealing ring, Sealing gasket. FKM RUBBER O-RING SEAL characteristics are as follows1. Can be heat-resistant to ...