Aluminum circle: It is including pressure cooker, non-stick cookware and cookware sets Aluminum circle:Alloy: 1×××, 3×××, 5×××, and 8×××Thickness: 0.6 to 7.0mmDiameter: 98 to 1000mmTemper: O-H19Packing: wooden case or wooden trayIt’s including pressure cooker, non-stick cookware and cookware sets