Bracket: ￡ 1.8mm galvanized plate, using the plus heat treatment by the phosphate electrostatic spray 
 Vacuum tubes: a three-target interference film technology, aluminum nitride absorption layer is made of stainless steel, high temperature long term air drying film is not aging, absorbing more than 12% increase in emission reduced by 65%, greatly improved set of heat. Three super-efficient king more than 20% collection efficiency than ordinary manifolds. 
 Tank: the selection of SUS304-2B food grade stainless steel, round head pressure capability. 
 Carton: Imported color steel or titanium white pearl board 
 Insulation layer: imported high-pressure polyurethane foam insulation, foam hole small, uniform-density, closed cell high, more suitable for the alpine region.