O Ring Material :NBR ,Silicone rubber ,NR ,FKM ,etc. Type : O-type ,U-type ,E-type ,V-type ,as your requirement O Ring1.Material :NBR ,Silicone rubber ,NR ,FKM ,etc.2.Type : O-type ,U-type ,E-type ,V-type ,can make according to your requirement.3.Different sizes and colour are available4.Application :for Motorcycle ,machinery ,Water pump ,Valves ,etc. O Ring