Nordic Ware Natural Aluminum Commercial Baker's Quarter Sheet 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 13.56 x 9.75 x 2.13 inches and interior dimensions 12 x 8.88 x 1 inches Proudly made in the USA by Nordic Ware