1)Inner water tank: SUS304-2B food grade stainless steel plates with thickness 0.4mm
2)Outer water tank: Galvanized steel plate with thickness 0.4mm
3)Vacuum tube: 47-1500mm/ 58-1800mm/ 58-2000mm, The using life lasts 15 years
4)Coating of tube: Al-N/Al-Cu
5)Bracket: Stainless steel / Aluminum alloy the thickness is 1.5mm
6)Seal: Silicone rubber
7)Insulation: Polyurethane foam and the thickness is more than 55 mm
8)Heater reservation: 72 hours
9)Hailstone resistance: 25 mm