Rubber o-ring 1.EPDM,PVC, material,extrusion 2.Application:Mainly used in ... any non-standard o-ring), washer, oil seal, cup seals, gaskets, U-rings, V-rings, Y-rings, back-up rings, etc.2) Custom ... Rings 1. Nitrile O Ring 2. Silicone O Ring 3. Viton O Ring 4. Ethylene Propylene 5. Neoprene O Ring etc 6. Custom shapes ... know details pls dont hesitate to contract us. Rubber O ring