Food grade aluminum alloys , safe to use, with good temperature conductivity. The bottom is detachable and can used for various Bakings. The loose bottom makings it easy to remove bakings good. It can place in oven for Bakings, and is particularly easy to make various large and pie, cake, and pie. It have a nonstick coat and can easily demolded. It easy to clean. Uniform heating result in better Bakings effect. Suitable for various Bakings need.