... 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, U-type, V-type,etc ... Seal, Rubber Oil Seal, Rubber Seal, Rubber Gasket, O-Ring: Black, red, yellow, brown, white, green, violet ... 6. Apply for: Auto, motorcycle, machinery, water pumps, valves, etc.7. We promise the high quality but ...