... 24Φ70*2000280 4.30 7-11Feature: 1.Solar water heater with CE,CCC,ISO9001,CNAL certificate2.Special high quality Insulated ... alloy, 1.5mmInsulation: polyurethane frothing, 50mmVacuum tube: AL/N coating, 47*1500/58*1800mmAccessories: MG rod, electrical heating, ... tube was evacuated into the tank; the coating inside of tube can absorb more than 92% heat energy from sunshine. The cold water in water ...