CE, ISO, Keymark, five years warranty, 6 years export experience, manufacture since 2000 Capacity 200L Type Evacuated Tube Certification CE, ISO9001 Brand Name QAL solar water heater Model Number QAL-BG-20 Pressure Unpressurized Iner tank Stainless steel SUS 304(0.31-0.6)mm Outer tank Stainless steel Insulation Polyuerthane foam Tank diameter 460mm Tube quantity 20 tube 58x1,800mm Bath(people 1 day) 4-5 package cortons with foam Angle 27'-45' Specifications Solar Water Heating System .Unpressurized solar water heating system .Certification:CE, ISO9001 .5-15 years warranty 24 hours service 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