1, vacuum tube: 47mm*1500mm,58mm*1800mm,there "high" new technology tube with30% higher performance.

 2, Frame material: importedaluminumalloysectionbar,strengthened tail support.

3 Use autamatic machinery foaming technique,super insulatin capability.

4 No water dirty,prevent frostbit,it's your best choices.5 Reflect angle; 45 degree

Vaccum Tube vaccum tube (solar water heater parts)