... CE certified, high efficiency, TIG welding, easy installation, reliable quality Solar Water Heater Vacuum Tube: Dia. 47/1500, Dia. 58/1500, Dia. ... ;Inner tank: Food class SUS 304 2B stainless steel sheet with thickness of 0.5mm;Inner tank Dia.: 310mm, 360mm, ... Dia.: 420mm, 470mm 600mm;Insulation material: High pressure PU foaming with thickness of 55 mm;Stand: Stainless steel profile, high intensity ...