1) ISO9001 / CCC / CE certificate
2) 3 years international responsibility for free repairing or exchange due to original quality problems
3) Super and strong heat absorption & preservation
4) Convenient installation: available on both horizontal and slanting house roofs
5) Vacuum tube: borosilicate glass 3.3, AL-N/AL or Al N/Al N-SS/Cu selective absorbing coating
6) Vacuum tube size: ¦µ47x1,500mm / ¦µ58x1,800mm
7) Vacuum tube qty: 12 / 15 / 16 / 18 / 20 / 21 / 24 / 30 / 36 pcs
8) Heat insulating layer: 50mm / 55mm / 60mm thickness polyurethane foam
9) Inner tank: made of SUS304-2B food grade stainless steel
10) Thickness of inner tank: 0.3-0.4mm
11) Outer tank: color armor plate / stainless steel
12) Bracket: galvanized steel plate / aluminum alloy / stainless steel, durable and stability performance, well wind resistance
13) Thickness of bracket: 1.2-1.5mm
14) Colour selection: red / golden / black / blue / purple
15) Optional accessories: assistant tank, electrical heater, controller