PROFESSIONAL GRADE – with a best in class 0. 8MM thick gauge, coated 3x with our ultra-durable metal utensil safe & super-nonstick coating, Granite Stone Pro Bakeware won’t warp or scratch, and heats evenly edge to edge so your muffins come out of the oven perfectly and evenly browned. PREMIUM NONSTICK – constructed from solid aluminum and coated with ceramic ensures the ultimate release -- everything just slides right off the surface, no need for baking sheets, oil or butter. DOESN’T WARP – can withstand years of use without warping because of its thick construction, with rolled edges to ensure the aluminum doesn’t warp or flex, and is designed to withstand years of use. OVEN SAFE & DISHWASHER SAFE – high heat safe up to 550°F & dishwasher safe for effortless cleaning experience.  # Pieces In Set: 5 Included: 1 12 X 17 Inch Cookie Sheet(s) Features: Non-Stick, Pfoa Free, As Seen On Tv, Oven Safe, Metal Utensil Safe, Dishwasher Safe Recommended Utensil Material: Metal, Silicone Measurements: 13.5 Height/Inches, 5 Width/Inches Maximum Temp (f): 500 Degrees F Base Material: 100% Aluminum Care: Dishwasher Safe, Hand Wash Material: Aluminum Country of Origin: Imported