DINGRE non-pressure solar water heater

solar water heater: 1. Certification:ISO9001, CE, CCC 2.inner tank: SUS 304-2B(food-level), thickness: 0.5mm; 3.outer tank: pearlescent board,aluminum and zinc plated board,stainless steel, thickness: 0.4/0.5/0.6mm; 4.insulation: polyurethane foam, thickness:50mm-60mm; 5.vacuum tube: high borosilicate all glass vacuumtube; 6.bracket: uses rich-red legs with wide flat spray zinc plate oblique to achieve doube-usage; 7.long-life: 15years;