ROBUST: the cake pan is made of 1 mm-thick, warp-resistant carbon steel, which is oven safe to 220C (428F). LOOSE BOTTOM: the pop-up base ensures neat results, so it's ideal for baking impressive bottom tiers, or large fruit or sponge cakes. International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.. . MasterClass Non-Stick Loose Base Deep Cake Pan, Carbon Steel Round Cake Tin, 30cm in Dark Grey