... , energy-saves 3,competitive price Solar Collector with heat pipe Material: 1.Heat Pipe:Red Copper,anti-freezing about ≥35°c2. ... Manifold:Stainless Steel,Aluminum Alloy--1.5mm3.Manifold:Red Copper Ø22mm,thickness 2mm4.Glass Tube ... Dimension:58*1800mm/47*1500mm5.Bracket:Stainless Steel,Aluminum Alloy-1.5mm6.Coating of Vacuum Tube:ALN/AIN ...