Galvanized Steel water tank,Evacuated glass tube ,Galvanized Steel frame. SC470 Galvanized Steel water tank, Outer Diameter is 470mm, Inner Diameter is 360, ... (Galvanized Steel) Thickness(0.4mm) Outer Diameter(470mm)Evacuated Glass Tube(Lenth*Diameter)=(1800*58)Frame(Galvanized Steel) Back Leg(45 ... Screw(SUS304)The price without Heating, Assistant tank, Controller. Thermosyphon Solar Water Heater