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Detailed Product Description Manifold material: Aluminum alloy; Thickness: 2.00mmInsulation: Rock wool  Core inside: Copper (T2); Thickness: 2.00mmframe: Aluminum alloy; Thickness: 2.00mmDiameter of the core: 35mmCover material: Nylon  Diameter of Interface: 22mmSolar tube: Heat pipe vacuum tubeStand parts: Aluminum alloy or stainless steel or galvanized steel sheet or Zinc Coated Steel,Thickness: 2.00mmReflector: Aluminum alloyFeatures:1) Reliable and efficient twin-glass solar tubes 2) Copper heat pipes for rapid heat transfer 3) Easy plug-in installation 4) Free maintenance 5) Suitable for mains pressure water (up to 8 bar/116psi) 6) Corrosion resistant silver brazed copper header 7) Powder coated (black, brown or silver) aluminum casing 8) Stable solar conversion throughout the day (tubes passively track the sun) 9) The perfect solar collector for domestic solar water heater systems 10) Ideal for commercial solar water heating applications How it works: 1) The operation o