Solar Water Heater1.Vacuum Tube:A).Material:High borosilicate 3.3 glass. All-glass tri-height vacuum tube.B).Absorptive coating: CU/SS-ALN(H)/SS-ALN(L)/ALN.C).Specification:58mm x1800mm,47mm x1500mm.D).Glass thickness:1.6mmE).Available sizes: 16,18,20,24,28,32,36,40 tubes.2.Water Tank:A).Outer water shell: Imported High quality Stainless steel,Pearl board,Color steel sheet,Galvanized steel plateB).Inner water chest: imported SUS304-2B stainless steel(food class).C).Heat insulation layer: 50~65mm ammonia ester integral foaming, superior heat preservation.D).Diameter of tank: 46cm/36cm,48cm/38cm,50cm/38cm.E).Insulation:50mm~65mm foam polyurethane.3.Frame:A).Material:stainless steel,galvanized steel,aluminum alloy.B).Angle of elevation:38C~50C