... 2.Anti-freezen & pressurized 3.10 years warranty Vacuum tube solar collecotr a. Module design, arbitrary combination, harmonize with ... -24-5818SC-H-30-5818Length of Tube1800mmOuter Diameter of Tubeφ58mmTube Quantity1518202430Manifoldcasing material,Aluminum Alloy,Thickness,1.8mm,Insulating ... Alloy,Thickness,1.8 mm, not have back-leg Rack InsertABSDimension(CBM)0.240.320.330.390.5Container Loading ...