Black Oil-resistant Rubber O Shaped Seal Washer (63x3 mm) Black rubber oil sealing O rings, high quality material, oil resistance, abrasion resistance and water proof. O-rings are donut-shaped rings used in industry to seal off or prevent leakage of fluid or gas in an application. It has good resistance to oil, water, high temperature and high pressure resistance. Suitable for both static and dynamic sealing. Use for quick-disconnect fittings, valves, pumps, and other fluid handling products. This nitrile rubber metric O rings works great on electronic equipment, pipes, carburetor repair, tap faucets, pumps, DIY home repair, sensors, trucks, cars, boat, engines, spray guns, pressure washers, pneumatic connection, etc. Provide secure seals for any oil, gas, air, and water seal application. Applications: Can be used in 3D Printers Automotive components Machinery components Bathroom facilities Household electrical appliances Electronic instruments