It is non-pressurized type solar water heater with water tank. It uses double-layer vacuum solar tube. This kind solar water heater is suitable for family in warm or hot areas. There is no water in its vacuum solar tubes, the water can be heated in its tubes, and then the hot water will be stockpiled in water tank. This non-pressurized solar water heater is very popular in asia, africa, torrid zone and warm area. 1) reliable and efficient with twin-glass solar tubes 2) easy plug-in installation 3) outer tank material: stainless steel plate or powder coated color steel sheet 4) inner tank material: 0.5mm thick sus304 food grade stainless steel plate 5) frame material: color steel 6) superior heat preservation ensured by 50 - 65mm polyurethane foam insulation layer All items are packed into cartons. For sample products, cartons are packed into plywood boxes. For containers, cartons are packed into container directly.