Jamie Oliver Baking Tray Nonstick Cookie Half Sheet Pan, Professional Heavy-guage Carbon Steel Construction - 15 X 10 Inch 15 x 10 Inch baking tray with 1 Inch high walls to eliminate dripping Heavy-gauge 1.0mm carbon steel construction for even heat distribution Two layers of durable, nonstick Quantum II coating on interior and Xylan coating on exterior keeps food from sticking Thick rolled edges prevent warping even at high temperatures up to 475 degrees F 25 Year Jamie Oliver Guarantee - Hand wash Recommended