... -Nx/Cu selective absorption coating;life:15 year3.frame:aluminum alloy,thickness:2.0mm4.water tank:color steel ... of Tube1800mmOuter Diameter of Tubeφ58mmTube Quantity1518202430Manifoldcasing material,Aluminum Alloy,Thickness,1.8mm,Insulating layer,compressed rock ... 5Container Loading Quantity(set)20102787763574022116916613613040HQ278213209172171Price(USD) Split aluminum solar water heater frame parts