professional manufacturer acquired certification: CE,CCC,ISO9001 energy saving offer OEM Evacuated tubeDia*Length47*1500,58*1800mmTypeHeat pipe.Absorption rateMore than 92%Tank capacity(L)100,120,150,180,200,240,250,280,300Tube quantity10-30 tubes.Outer tank diameter420mm,460mm,470mm,480mmInner tank materialSUS304-2B, thickness1.2mm,1.5mm,2.0mm. Water purity for drinking.Outer tank ...