The Stainless Steel Cookie Sheet is made of Premium 430(18/0) stainless steel without chemical coating.No more aluminum into your food, bringing you a healthier cooking experience. SPECIFICATIONS: Outside Dimension: 24 x 16 x 1.3 inch Material: 430 Stainless steel Finish: Shiny mirror finish Color:Sliver Weight: 1KG Package included: 1* baking sheet: 24L x 16W x 1.3H inch 1* cooling rack: 22.8L 14.6W 1 inch Why you choose Stainless steel oven pan 1. Stainless steel pan is more healthier and non-toxic than aluminum pan 2. Stainless steel pan is dishwasher-safe, but aluminum pan not 3. Stainless steel sheet is more easier to clean even hand-wash 4. Stainless steel sheet less stick than aluminum pan TIP for Stainless Steel Q:It is normal phenomenon the pan warp because of the uneven heat.It can return to its original shape when cooled down and doesn't its usage. A: Avoid this is to preheat the pan and add your food after the pan is hot. After-service: 100% SATISFACTION -- 90 days return and money back guarantee, you can purchase without any risk.