Calphalon Nonstick Bakeware Baking Sheet with Cover, Toffee Heavy-gauge steel core won't warp and heats evenly without hot spots so your cookies and cakes come out of the oven perfectly and evenly browned Toffee-colored nonstick surface easily releases baked goods for flawless results Snap-on cover helps keep your confections fresh and makes it easy for you to take cakes on-the-go Large baking surface and raised edges let you use this pan to bake everything from cookies to sheet cakes Protected by a Full 10 Year Warranty