... :GB-CU-SS-N/AL-58-1800 2.Inner tank:SUS304-2B,1.2mm3.Outer tank: drawbench silver steel,0.4mm4.Frame: coated ... galvanized steel,1.5mm5.Insulation:polyurethane,55mm Remark 1.Storage tank diameter(mm):360/470 2.Electric heater connection(inch):13 ...