Stellar Bakeware is made of quality steel and non-stick coatings. The bakeware is made from a high grade 1mm steel with rigid rolled edges, which provides strength and durability, meaning you'll be able to use this bakeware again and again. All the surfaces of the bakeware feature a double layer of a non-stick coating, making the bakeware easy to use and to keep clean. All of the bakeware is dishwasher safe and feature a lifetime guarantee from Stellar and a 5 year guarantee on the non-stick coating.