This baking tray is made of food grade aluminum alloy material, which is anti-rust and safe to baking. Design with breathable holes, so this baking tray is ventilate and allows air to circulate around the food and non stick. Made of aluminum alloy material, which is safe and durable. There are multiple sizes for you to choose from. It is suitable for baking pizza at home. Item Name: Baking Tray Material: Aluminium Size Details: Diameter: 20.32cm/8"(Approx.) Diameter: 25.4cm/10"(Approx.) Diameter: 30.5cm/12"(Approx.) Diameter: 35.5cm/14"(Approx.) Diameter: 40.6cm/16"(Approx.) Diameter: 45.7cm/18"(Approx.) Diameter: 15.24cm/6"(Approx.) Diameter: 22.86cm/9"(Approx.) Diameter: 18cm/7"(Approx.) Diameter: 27.95cm/11"(Approx.) Diameter: 33cm/13"(Approx.) Diameter: 35cm/15"(Approx.) Diameter: 43.2cm/17"(Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Baking Tray(Others Not Included)