1: Material:Silicone,NBR,NR FKM, etc 2: Have lots of existed o-ring molds 3: Available in various sizes and colors We ... Shore A (-/+): 40-1002,Working Temperature: -65+300°C3,Color/Size/Logo: Black or according to client requirement4,Unit price:Depends ... ' design and specification are accepted.Building a Brand New Future Various Rubber Silicone O-ring,Silicone Sealing Ring