Material Inner tank: SUS304 stainless steel Outer tank: Galvanized steel alloy Bracket: Galvanized steel alloy Coper coil:High quality coper coil Heat insulation layer: Imported polyurethane Heat pipe: straight copper pipe Thickness Inner tank: 1.2mm Outer tank:0.4mm Bracket: 1.5mm Heat insulation layer: 50mm Working Temp. 99 Celsius degree Working Press. 1.0MPa (10 bars) Coloration as per Quality Certificate ISO9001:2000, CE Warranty 5 years for full system / 15 years for vacuum tube MOQ negotiation Lead time within 15 days for full container at factory Payment terms Telegraphic Transfer (T/T), Letter of Credit (L/C)