Our top-rated Naturals®Bakeware collection is made of pure aluminum for superior heat conductivity and produces consistent evenly browned baked goods every time. These premium pans have a lifetime durability and will never rust. Encapsulated galvanized steel rims prevent warping. Creativity meets natural aluminum sustainability. # Pieces In Set: 3 Included: 1 11 X 17 Inch Cookie Sheet(s), 1 10 X 15 Inch Cookie Sheet(s), 1 13 X 18 Inch Cookie Sheet(s) Features: Oven Safe Recommended Utensil Material: Wood, Silicone, Nylon, Metal Shape: Rectangle Measurements: 12.8 Width/Inches, 17.8 Depth/Inches, 1.09 Height/Inches Maximum Temp (f): 450 Degrees F Base Material: 100% Aluminum Care: Hand Wash Material: Aluminum Country of Origin: Made in US