Vacuum Tube Solar water heater: CE certified, high efficiency, TIG welding, easy installation, reliable quality, ... , high efficiency, TIG welding, easy installation, reliable quality Solar Water Heater Vacuum Tube: Dia. 47/1500, Dia. 58/1500, Dia. 58 ... 600mm;Insulation material: High pressure PU foaming with thickness of 55 mm;Stand: Stainless steel profile, high intensity aluminum profile or ...