... ring 1.Durable in liquid material, mineral oil,lubricant etc 2. High flexibility 3.Resistant to sunlight, ozone silicone O ring1.Material :Made ... of NBR ,Silicone ,FKM ,EPDM ,PTFE etc.2. Application :Widely used in Automobile,Engine ,the Gear Box ... and production , we will reply you very soon . silicone O ring