... silicone materials with FDA&SGS certificate. (2) Temperature range from -40 to 250 centigrade.(3) Tasteless, Nontoxic,Anti-dust, non-sticking ... , impermeable.easy to wash.(4) Safe to use in ovens, microwave ovens, dishwasher and freezer.( ... or embossed etc.Supply Chain The raw materials are imported from Dow Corning, Shin-Etsu, Waker, and other brand. Factory ...