solar water heaters with good quality high efficiency and very competitive price. Sell solar water heater production line for home appliance 1. Inner tank: 0.4mm-0.6mm thickness SUS 304-2B Stainless steel 2. Tank diameter: 470mm/480mm outer tank, 360mm/370mm inner tank 3. Vacuum tube: QB-AL-N/AL-47-1500mm/58-1800mm 4. Outer tank: 0.31mm-0.4mm thickness Wiredrawing Metal Plate/Fluorin Carbon Plate ...