Solar Water Heater 1.beatiful design 2.competitive price 3.CE,ISO9001,CCC,SGS 4.anti-hail Non-pressurized Solar Water Heater1. Inner tank: 0.31/0.4/0.5mm thickness stainless steel SUS304-2B , advanced welding technique,2. Outer tank: 0.31/0.4mm thickness stainless steel SUS304-2B/Galvanized,advanced welding technique3. Corrosion resistant4. Insulation layer: 50mm polyurethane foam5. Frame ...