... WATER HEATING, EVACUATED TUBES, VACUUM TUBES, HEAT PIPE SOLARWATER HEATER, HEAT PIPE SOLAR COLLECTOR, SOLAR PANELS, SOLAR COLLECTOR, SOLARCOLLECTORS, ... to reducing the heat loss rate3.High quality heat pipe for efficient heat transferring and long life span of ... 30pcs, 40pcsTube hail resistance:≤25mmPackage heat pipe solar collectorStandard carton box for the full container quantity.Special wooden box ...