Product Name: Solar Collector for Solar Water HeaterModel Number: SFAPlace of Origin: ChinaFeatures: 1) Reliable and efficient with twin-glass solar tubes 2) Easy plug-in installation 3) Outer tank material: stainless steel plate or powder coated color steel sheet 4) Inner tank material: 0.5mm thick SUS304 food grade stainless steel plate 5) Frame material: 1.2mm stainless steel 6) Superior heat preservation ensured by 50 - 65mm polyurethane foam insulation layer