... principle Factory price CE,ISO9001,SGS,CCC OEM is available Non-pressurized solar water heater,compactSimple structure and working principleCost-optimalCE,ISO9001,SGS ... Polyurethane,50mm(JNYL),50-60mm(JNQG)Optional spare parts:Electric heater,magnesium rod,assistant tank,reflectorPacking:Export carton with full foamsRemark ... /300/360L(58*1800) Compact non-pressurized solar water heater manufacturerer