Specification 47mm-1500mm/58mm-1800mm Quantity of tubes 15/18/20/ 24/30/36 Manifold aluminum alloy Glass tube Borosilicate glass 3.3 Hail resistance 25mm Pressure 6 bar Features 1. High efficiency solar collector using heat pipe evacuated tubes 2. Able to be used in all climates 3. Reliable and efficient with twin-glass solar tubes 4.Copper heat pipes for rapid heat transfer 5. Easy plug-in installation for mounting on the roof or at ground level 6.Maintenance free 7. Suitable for mains pressure water (up to 8bar/116psi) 8.Corrosion resistant silver brazed copper header 9 .Frame material aluminium alloy or stainless steel 10 .Casing material 304 stainless steel or aluminium alloy 11. Excellent insulator in polyurethane 12. Collectors may be connected in series to increase water heating capacity 13.Tubes easily replaced if broken 14. Ideal for commercial solar water heating applications