Features: 
      1) Exterior tank:Made of stainless steel with 0.4mm thickness;
2) Interior tank: Made of food grade SUS304-2B stainless steel with 0.4mm     thickness
3) End cap:Stainless steel outer buckle
4) Bracket: stainless steel bending bracket, 1.2mm thickness 
5) Thermal insulation level:55mm imported polyurethane overall froth foaming by high Pressure foaming machine　　　　　　　　　　　　　　　　　　　　　　　　　　　      
6) Exterior diameter: 420mm, 470mm
7) Water tank capacity: 80 ~ 300L
8) Heat concentration element: Φ47×1,500 / 58×1,800mm glass vacuum pipes
9) Pressure endurance: <0.05mPa