KitchenAid Cooks Series 15-Inch and 17-Inch Slider Twin Pack Set includes 2 cookie sheets measuring 15 inches and 17 inches Constructed of .6 mm carbon steel for strength and reliable heat distribution Durable nonstick coating releases food easily and withstand metal utensils Tapered edge allows food to slide off easily; oversized rims provide a secure hold Cleans safely in the dishwasher; covered by KitchenAid's replacement warranty