O-ring Material:EPDM,SBR NR,NBR and Silicone Any size and color are available O ring features: 1. Material: NBR, silicone, NR, FKM, neoprene ... , etc2. Types of O-Ring: O-type, E-type, ... of the Oil Seal, Rubber Oil Seal, Rubber Seal, Rubber Gasket, O-Ring: Black, red, yellow, brown, white, green, violet etc, can make ...