... tank (interior): Stainless steel inner tank5) Manifold : aluminum alloy out casing & red copper flow passage6) Glass tube: new ... Tube1800mmOuter Diameter of Tubeφ58mmTube Quantity1518202430Manifoldcasing material,Aluminum Alloy,Thickness,1.8mm,Insulating layer,compressed rock woolHeat ... 10-4,Service Life,10 years Mounting FrameAluminum Alloy,Thickness,1.8 mm, not have back-leg Rack InsertABSDimension ...