... simple structure,easy installation. 3.Outsta non-pressure solar water heater:1.Vacuum Tube Specifications:Dia 47x1.6,Dia58x1.8 ... ,Dia58x2.12.Water Tank Liner: Imported SUS304-2B food grade stainless3 ... porcelain plate5.Tube Number Range:16,18,20,24,30,366.Capacity:95L-208L7,Elegant design8.Light ... , simple structure,easy installation non-pressure solar water heater