... sizes are various 3.you can order ahead of time thread seal Standard Material Properties ASTM/DIN ISONBRACMVMQFKM(NEM)HNBR(NEM) ... size.4.Optional color for you of the Oil Seal,Rubber Oil Seal,Rubber Seal,Rubber Gasket, O-Ring :Black, red, yellow, ... quality but competitive price of Oil Seal,Rubber Oil Seal, O-Ring, Rubber Seal, Rubber Gasket, Rubber Ring, Sealing Ring, Sealing Gasket. thread seal