Silicone seal ring: 1,Non-toxic,Waterproof,Dustproof 2,Under wear and pressure 3,Environmental protection 4,Durable,etc. Silicone seal ringDescription:1>Made of 100% grade silicone with FDA and ROHS approval;2>Non-texic and odorless,Dustproof,Waterproof,Durable;3>Under wear,pressure and high temperature;4>All color are available,5>OEM order are welcome. Silicone seal ring