1.material:teflon ,ptfe,rubber,nbr,ect 2.various size and color 3 ... Seal,Rubber Oil Seal,Rubber Seal, also can make on your size.5.Optional color for you of the Oil Seal,Rubber Oil Seal,Rubber Seal,Rubber Gasket, O-Ring ... high quality but competitive price of washer,Oil Seal,Rubber Oil Seal, O-Ring, Rubber Seal, Rubber Gasket, Rubber Ring, Sealing Ring, Sealing Gasket.9. Manufacture Process : Heading ...