... etc 2. High flexibility 3.Resistant to sunlight, ozone silicone O ring1.Material :Made of NBR ,Silicone ,FKM ,EPDM ... :Widely used in Automobile,Engine ,the Gear Box ,the Vehicle and Sedan Chairs ,the Seering system,the Wheel hub and so on . ... 3. We are leading manufacture focus on on profeeional O,U ... , we will reply you very soon . silicone O ring