... Europe, etc 300L Non-pressure Stainless Steel Solar Water Heater(OEM Service)1. Solar Water Heater Inner tank: stainless steel SUS304-2B , advanced ... 0.31/0.4/0.5mm2. Solar Water Heater Outer tank: stainless steel SUS304-2B/Galvanized,advanced welding technique, ... resistant4. Insulation layer: 50mm polyurethane foam5. Solar Water Heater Bracket: stainless steel SUS201, thickness: 1.4mm 6. Capacity: ...