1) CE,ISO-9001,CCC,CNAL Solar Water Heater 2) High quality stainless steel water tank 3) Thick insulation layer,best density solar hot water energy Material Accessories: MG rod, electrical heating, assistant tankLogo: OEM, co lour printing /sticker ItemData MaterialInner tankSUS 304-2B food grade stainless steel , 0.41mm Outer tank galvanized/ co lour steel, 0.31mm Frame galvanized steel/ ...