The tray is compatible with vacuum ovens for all your cooking needs. Made with 100% platinum cured medical grade silicone and has a safe heating temperature of up to 450A, AF. Great for all baking uses, the white non-stick oven trays are made of Platinum Cured Silicone. The metal base is completely encased in Platinum Cured Silicone. Low profile, perfectly fits .9 cuft and 1.9 cuft ovens.