Ever made the perfect muffin and tried to get it out the tray and theyre stuck there will be non of this with the patented non stick surface of this carbon steel circulon 12 cup muffin tray lab tests prove the total nonstick system outlasts all other bakeware non sticks guaranteed baked foods release with ease is easy to clean and provides perfect even baking performance oven safe to 500 f260 c or gas mark 9 lifetime customer satisfaction guaranteed measures 33cm x 24cm x 3cm