The baking sheet with wire rack are made of high quality stainless steel without any chemical coating, wouldn't create chemicals at high-temperature baking, great replacement to aluminum pan, rust free and healthy for your daily use.Unique design with corrugated surface in the bottom of sheet pan, to reduce the risk of food sticking, facilitates air flow for quick release and even baking. This design also strengthen the structure to the pan for warp resistance.4 Pieces Bakeware Set - Including 2 cookie sheets 16 x 12 x 1 inch and 2 cooling racks 15.35 x 11 x 0.65 inch, fits most regular oven, toaster oven and some air fryer, work perfectly together and also can superbly apart. Perfect baking sheets for oven for baking dinners, dozens of cookies, vegetables, cakes, chicken, bacon or crisp up foods in your oven.