Description:Made of nitrile rubber(NBR)material,heat-resisting,mineral oil-resisting,wear-resisting.Rubber construction resists oil,gas,water,durable.Can effectively prevent the oil leakage air leakage,have good sealing effect.Professional tool for commercial or occasional use.Suitable for car engine system,transmission,shock absorber etc.Easy to store,low weight.Package Include:200(+/-2%) x O-Ring Seal Gaskets.