Safe Material:Our Silicone Baking Mold are made of food grade silicone,not fragile,not deformed,not easy to age,does not contain harmful substances. Resistance to High Temperatures: The silicone donut molds can withstand temperatures from -40 to 230 degrees Celsius, can be used in ovens, dishwashers, freezers, refrigerators and microwaves. (Do not heat with an open flame) Extensive applications: Large, round, professional donut cake mold - ideal for baking some desserts such as chocolate, cakes, donuts, etc. Suitable for birthday, party, wedding, etc.