Material safety: The circular cooling rack is made of food-grade 304 stainless steel, which is healthy for daily use, rust-free after cleaning, safe and non-toxic, high temperature and corrosion resistant. Friendly design: The multi-function cooling frame is woven with 1.8mm thick stainless steel wire, and the frame is 4-5mm thick, which is strong and durable. The edges are smooth without rough spots.The surface is slightly convex, but the tight parallel lines prevent food from falling. Even cooking: Each cooking rack is raised 0.78 inches to allow air to circulate on all sides of the food to cook evenly and cook quickly. It is the best tool to help you save repeated cooking time. Durability: Thick stainless steel wire, strong and seamless welding, food should not be dropped. The sturdy tripod can support heavy food, and the oven is safe and durable.