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: 47-1500mm/58-1800mm 4. Outer tank: 0.31mm-0.4mm thickness Stainless steel/color steel 5. Frame: stainless/1.5mm thickness Galvanized steel 6. The material of insulation: 55-60mm Thickness polyurethane 7. The reflector: stainless steel /aluminum Plate 8. Working efficiency: >95% 9. Heat preservation time: 72-96hours 10. Hail resistance: 25mm 11. Inlet/oulet size: 1/2'', 3/4'' 12. Tank capacity: 100l/110l/115l/135l/150l/165l/200l/250l/2 85l/300l 13. Air vent: 100% copper vent Xxx