These cake molds have a made of professional, high quality carbon steel, which has a high level of hardness and durability. BPA-free, oven safe at 445 / 230 , non-toxic and non-stick coated. So it's easy to loosen film, easy to clean, wear-resistant. The non-stick surfaces of the baking molds make it easy for you to remove the cake without damaging its structure or texture. The locking side wall can be easily removed. The spring lock provides a tight, leak-proof seal. Note: Water will run out of the baking tins, but the dough will not run out. Pay attention to the fit between the chassis and the mold. Three non-stick coated cake tins - Use this springform set of three non-stick coated tins (4in / 7in / 9in) to create beautiful, three-tier cakes and tarts for any occasion! Cake pans can be used to bake beautiful three tier cakes for occasions like birthday, party, wedding, etc. Great for making various cakes like cheesecake, mousse cake, chiffon cake, delicious food, etc. Sales support: For any possible broken product, please contact us by email. We can offer you a satisfactory answer.