Solar water heater 1 pressurized inner tank: stainless steel sus304f¼1.2mm 2 vacuum tube: qb-al-n/al-58-1800 3 outer tank: painted steel-0.4 mm, stainless steel sus304-0.4mm 4 frame: coated galvanized steel sheet-1.5mm;stainless steel sus430-1.5mm. 5the material of insulation:polyurethane 55mm 6 the reflector:aluminum component : al 99.85% surface oxidation. Characteristic: 1 it takes the advantage of the tap waterf+s pressure.More pressure, more comfortable. 2 the water can be heated rapidly, so it can produce the high quality hot water. 3 it can produce more hot water than the general types because it isnf+t restricted by the volume of the tank. G.W. 89kg