... withstand high pressure 2. never overfull 3. longer service life solar collector reliable performance, low maintenance, arbitrary combination, covenient replacement. One ... degreeSpecification:1)Outer shell material: Aluminium alloy2)Inner material: Red copper channel3)Adjustable installation angles: 30°, 45°,60°4) Heat- ... ) Anti-Hail: 25mm6) Bracket: Aluminum alloy7) Anti-Frozen: ≥-35% solar collector