Inner tank and outer tank are both 0.4mm SUS3042B food grade stainless steel, welded by argon arc. Heat insulation of water tank adopts polyurethane foam, thickness is 55mm.

The tubes and supports are adjustable, power bearing is average and assure the tubes to use long time.

Whole vacuum tube adopts super borax and silica glass. Absorb rate≥93%, thermal radiation rate≤6%. Resist 25mm hail, using life lasts 15 years.

Silicon ring to connect and seal them.