silicone o-rings 1.material:SILICON 2.working.temperature:-40c~+120c 3.size:as request O-Ring is a kind of sealing ... 3. Different sizes of oil seal, also can make on your size. 4. Optional color for you of the oil seal, O-Ring and rubber gasket ... promise the high quality but low price of Oil seal, O-Ring , Rubber seal, Rubber gasket, Rubber ring, Sealing ring, Sealing gasket. silicone rubber O-rings