CE, ISO, Keymark, five years warranty, 6 years export experience, manufacture since 2000 Solar water heating system details Model: QAL-BG-24 Description Stainless steel Solar Water Heater Iner tank Stainless steel SUS 304(0.31-0.6)mm Outer tank Stainless steel Insulation Polyuerthane foam Tank diameter 460mm Tube quantity 24 tube 58x1,800mm Tank capacity 250L Lighted Area 3.74 mx2 Bath(people 1 day) 5-6 Angle 27°-45° Set Including : 1 water tank + 1 bracket +30 Evacuated tubes What are your main products? Our company is factory in Tongyuan Industrial Park,Jiaxing City, can provide you Split pressurized solar water heater system (150L,200L,300L,400L,500L) Compact pressurized solar water heater system (150L,180L,200L,300L,360L) Compact Unpressurized solar water heater (150L 180L 200L 250L 300L 360L ) Compact pressurized Flat panel solar water heater system Solar water heater collectors More details,please email us. company's website : www.china-nicesolar.com Our Add:Industrial Park of TongYuan Town,Haiyan,zhejiang Province,China. Fax:0086-0573-86617722 E-mail:qalsale3@china-nicesolar.com Skype:Mindy