Nordic Ware Natural Aluminum Commercial High-Sided Sheet Cake Pan with Lid Natural aluminum commercial bakeware is made of pure aluminum which will never rust for a lifetime of durability Baked goods rise and bake evenly due to aluminums superior heat conductivity and the reinforced encapsulated steel rim prevents warping Easy clean up, hand wash only Pan exterior dimensions 19 x 14 x 3.5 inches and interior dimensions 17.13 x 12.13 x 2 inches Proudly made in the USA by Nordic Ware