SP-R MODEL:

Inner tank 0.4mm SUS304 stainless steel made in Korea,Middle polyurethane made by Germany Bayer .Outer tank is 0.4mmcolor steel. frame is 1.2 mm zinc-coated.

1. Whole glass vacuum tubes adopt super hard borax andsilica glass;

2. Absorb rate: ≥93%, thermal radiation rate: ≤6% (100???)

3. Temperature when exposed to sun without water:250???, 2.5hours to boiling if using single tube;

4. Resist 25mm hail, using life can last 20years.

5. The price list is not including thereflector.