We supply all different kinds of solar water heater with good quality and very competitive price. SRCC,SOLAR KEYMARK,CE,ISO, Specification:Inner tankSUS304/316 ... stainless steelInsulating layerPolyurethane foam, thickness is 60mmWorking pressurizedWorking pressure is 6 bar, test pressure is 9 barElectric booster1500WEvacuated tube58/1800 or 47 ... /58-F/AL-C/40-302.284300L23/46/55 Solar Water Heater