... -Nx/Cu selective absorption coating;life:15 year3.frame:aluminum alloy,thickness:2.0mm4.water tank:color steel plate ... allows us to be highly competitive.NOTE:1.above prices are based on FOB shanghai2.warranty:5 years for the ... 30-5818Length of Tube1800mmOuter Diameter of Tubeφ58mmTube Quantity1518202430Manifoldcasing material,Aluminum Alloy,Thickness,1.8mm,Insulating layer,compressed rock woolHeat ...