... WATER HEATERPRICE, SOLAR WATER HEATING, EVACUATED TUBES, VACUUM TUBES, HEAT PIPE SOLARWATER HEATER, HEAT PIPE SOLAR COLLECTOR, SOLAR PANELS, SOLAR ... COLLECTOR, SOLARCOLLECTORS, SOLAR COLLECTOR PANELS, EVACUATED TUBES ... )mmVacuum tube kind: three target coatings vacuum tubes ALN/SS/CUHeat pipe material:TU1 Tube quantity ...