... ring,V ring,U ring,etc Natural Rubber o ring 1. Main materialNatural rubber, also can use Silicone,IIR,SBR ... For example, air blower, water pump, instrument, measuring of ships and so on.7. Main performanceThe outstanding strength of natural rubber ... ).Hardness or duro.Tolerence.Color.QuantityMORE Rubber ringhttp://www.shanrong-rubber.cn/productgrouplist-212134849/Rubber_ring.html Natural rubber o ring