All-Clad 9003SB Ovenware 14-Inch x 17-Inch Baking Sheet Bakeware, Silver Bonded tri-ply 18/10 stainless steel construction with aluminum core that produces supremely-even heat distribution Designed to withstand extreme heat of commercial ovens. Maintains precise shape throughout a lifetime of service Lifetime guarantee of superior performance and made in the USA Dishwasher safe