... 3.outer and inner side sand processing Casserole:1.3PLY stainless steel ,thickness 2.5mm:304ss0.4mm+Al1.5mm+430ss 0.6mm2 ... , strong and durable3..Aluminum core heats evenly and quickly4.Polished magnetic stainless steel outer layer offers beauty and ability to perform on induction ... cooking surfaces, including induction, electric,halogen, radiant, ceramic and gas. stainless steel casserole