FOOD GRADE STAINLESS STEEL: The deep baking tray is made of premium quality stainless steel, No worry about any extra chemical substance or harmful coating leaching into your food, Great substitute for aluminium pan, Anti-rust and food-safe materials for daily healthy useANTI-WARP CONSTRUCTION: Heavy-duty construction and will never deform or bend for long-lasting reliability, Proper thickness ensures even-heat transfer and feels reassuringly sturdy on hands, Leak-proof seamless design that turns out perfect sheet-cakes or brownies