... Water Heater(OEM Service)1. Solar Water Heater Inner tank: stainless steel SUS304-2B , advanced welding technique, thickness: 0.31/ ... . Insulation layer: 50mm polyurethane foam5. Solar Water Heater Bracket: stainless steel SUS201, thickness: 1.4mm 6. Capacity: 100-360 liters7. ... Type: 12, 15, 18, 20, 24, 30, 36tubes8. Heat preservation: 72hoursSolar water heater ...