... working principle Cost-optimal CE,ISO9001,SGS,CCC OEM Compact/non-pressurized solar water heater,200LSimple structure and working principleCost-optimalCE,ISO9001,SGS,CCCOEM ... .4-0.5mm(JNYL),Stainless steel 0.4mm(JNQG)Vacuum tube:Single-targer/Three-target;47*1500/58*1800Bracket:Galvanized steel ... (47*1500);150/180/200/240/300/360L(58*1800) Compact /non-pressurized solar water heater 200L/manufacturer