Heat insulation of water tank adapts polyurethane foam
Thickness: 55mm
Tubes and supports are adjustable
Power bearing average and assures tubes to use long time
Whole vacuum tube adapts super borax and silica glass
Absorb rate: ≥96%
Thermal radiation rate: ≥4%
Resist 25mm hail
Lifespan: 15 years
Silicon ring to connect and seal
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