PERFECT SET- 4-Piece Baking Sheet Set - Including 2 cookie sheets 9 x 7 x 1 inch and 2 cooling racks to fit most regular ovens and toasters, our baking sheets and cooling racks have been carefully designed to match and separate perfectly. HEALTHY MATERIALS- Roasting pan with Cooling Rack is made of high-quality 304 stainless steel without any chemical coating, does not produce chemicals when baked at high temperatures, does not rust, and has a healthy diet, suitable for daily use. The unique corrugated surface design at the bottom of the baking tray reduces the risk of food sticking, and facilitates air circulation, quick release and even baking. COOLING RACK- thickened and thick stainless steel lines, seamless welding, do not worry about falling off, durable. Six raised legs ensure stability and even cooling, allowing even circulation and baking of hot air, and are removable. A denser lattice is better for small foods. DURABLE AND STURDY- Thick gauge baking tray structure is strong, and the rack is soldered firmly. The reinforced edge provides extra strength, makes both grips and transfers comfortable, helps prevent twisting and warping, and is sturdy and durable for long-term use. Corrugatedbottom with excellent workmanship reduces food sticking. EASY TO CLEAN- Mirror-polished baking tray, smooth without rough spots. The deep sides keep the oven clean by preventing juices from running everywhere. Both the baking sheet and cooling rack are heated in the oven to 410 degrees Fahrenheit, and both are dishwasher-safe without discoloration.