... 3.High anti-corrosion tank 4.OEM available Hot Sale Compact Solar Hot Water Heater System Shell: New type Flourish Tang painted ... coat adopts magnetron sputtering, optional film coating. Three target: copper, aluminum, stainless steel, multiple absorption, multi-heating, ... , with double layer anti-corrosion sprayed on the surface, structure compact, strong and beautiful. 51° angle suitable for flat ...