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Features: 

1) Exterior tank: Made of aluminum plating zinc plates or color steel plate with 0.4mm thickness;

2) Interior tank: Made of imported food grade SUS304 2B stainless steel sheet with 0.4mm thickness;

3) End cap: Plating zinc plates outer buckle

4) Bracket: galvanized sheet bracket

5) Thermal insulation level: 55mm imported polyurethane overall foaming by high pressure foaming machine

6) Exterior diameter: 420 or 470mm

7) Heat concentration element: Φ47×1,500 / 58×1,800mm glass vacuum pipe

8) Pressure endurance: <0.05mPa