... Size as customers' request Silicone ring can be, EPDM, natural rubber and other materials produced, the use of a wide range (for ... ,freezer.6.Standing temperature: -40-300degrees celsius7.High performance and quality to meet specification are welcome8.OEM is available 9 ... sizes, colors(such as Clear, White, Red, Blue and so on)and material are optional. 10.Silicone,Viton,Neoprene,Hypalon, plastic ...