... :natural rubber 2. Type:O ring,X ring,V ring,U ring,etc 3. Prolong machine life, reduce maintenance costs 4. Used for sealing water, oil, air ... o rings, rubber seals, rubber gaskets, rubber grommets,rubber washers, rubber bumpers, seal components, rubber suction cup, damping pads, insulating pieces, dust-proof pieces, and other related products.And custom rubber ...