Solar water heater 1. Material of inner tank chest is SUS304/2B; 2. Material of outer tank shell is imported color armor plate 3. Support material: Galvanizes the steel plate, thickness: 1.2mm 4. Collector: DIA58/2000mm tube 5. Capacity of DIA58/2000mm: 10L/tube 6. Heat insulating layer: 55mm polyurethane foaming