O-Rings, Custom Rubber Parts, Rubber Balls manufacturer / supplier in China, offering NBR Mechanical Rubber Seal for Hydraulic & Pneumatic Equipment - Oil Resistant, 70 Shore a, Custom Mechanical Rubber Seal - NBR / EPDM / FKM / Silicone - for Pumps, Valves & Machinery - OEM, EPDM Mechanical Rubber Seal Ring for Industrial Machinery - Weather & Ozone Resistant, -40°C to +120°C and so on.