A necessity for any chef's kitchen, baking professionals know that the secret to evenly-baked and perfectly browned food is to cook with aluminum bakeware. Aluminum is widely known for its excellent heat conductivity and cooks more evenly and thoroughly than other metals. This commercial-duty pan is made of even-heating rust-proof aluminum and features a galvanized steel reinforcement around the rims for added strength. This sheet cake baking pan is perfect for full depth sheet cakes, lasagnas and bars, with its 2 inch sides. Turns out perfect results every time. Aluminum is reactive to the acids in certain foods such as vinegar and tomato products which may darken, pit or corrode the pan. Pan exterior dimensions 17.9 x 13 x 2 inches and interior dimensions 17.3 x 12.4 inches. Proudly made in the USA by Nordic Ware.