... Tube Solar water heater: CE certified, high efficiency, TIG welding, easy installation, reliable quality, good finish. Super stainless steel CE ... certified, high efficiency, TIG welding, easy installation, reliable quality Solar Water Heater Vacuum Tube: ... , 120pcs;Inner tank: Food class SUS 304 2B stainless steel sheet with thickness of 0.5mm;Inner tank Dia.: ...