O Rings, Oil Seals manufacturer / supplier in China, offering 2′′ 3′′ 4′′ Hammer Union Seals Lip Seals Stainless Steel Seal Rings for Oil and Gas Service, Plunger Pump Seals for High Pressure Pressure Washer U/V Type Seal Kit, Tc Type Rubber NBR Shaft Seal 20*34*7 Oil Seal for Automotive and so on.