Nordic Ware Natural Aluminum Commercial Baker's Jelly Roll Baking Sheet Proudly made in the USA by Nordic Ware Natural aluminum commercial bakeware is made of pure aluminum which will never rust for a lifetime of durability Made of pure aluminum to produce evenly browned goods Baked goods rise and bake evenly due to aluminums superior heat conductivity and the reinforced encapsulated steel rim prevents warping Fits into European sized ovens