Cuisinart AMB-17CS 17-Inch Chef's Classic Nonstick Bakeware Cookie Sheet, Silver, 2-Pack Cookie sheet made of heavy-gauge aluminized steel for fast, even heating Tapered-edge design allows baked goods to slide off effortlessly Durable, Whitford Xylan nonstick coating on interior and exterior surfaces Dishwasher-safe; oven-safe to 450 degrees F; warp-resistant Measures approximately 17 by 12 inches; limited lifetime warranty