1. Sectional metal heat-pipe vacuum tube (size: 58mm*1800mm); No water in vacuum tube, no water dirty, prevent freezing.
2. "Crystalline inner tank": Working Pressure: 0.6Mpa ( the steel plate and macromolecule material connection very well)
3. Insulation: Polyurethane integral foaming with 55mm thickness
4. Material of outer tank: 0.41mm thickness SUS 304 2B
5. Material of support: Stainless Steel SUS 304 2B Profiled Bar with 1.2mm thickness
6. Using the electric heater system, it can be lasting used in the cloudy, rainy and snowy days.