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: 2 Included: 1 11 X 17 Inch Cookie Sheet(s) Features: Oven Safe Recommended Utensil Material: Silicone, Wood, Nylon, Metal Shape: Rectangle Measurements: 17.8 Depth/Inches, 1.06 Height/Inches, 12.8 Width/Inches Maximum Temp (f): 450 Degrees F Base Material: 100% Aluminum Care: Hand Wash Material: Aluminum Country of Origin: Made in US