Detailed Product Description:Thermosyphon Tubular solar water heater 1) Reliable and efficient with twin-glass solar tube 2) Easy plug-in installation 3) Outer tank material: stainless steel plate 4) Reliable and efficient with twin-glass solar tubes 5) Easy plug-in installation 6) Outer tank material: stainless steel #304/2B 7) Inner tank material: 0.4mm thick SUS304 food grade stainless steel plate 8) Frame material: stainless steel #304/2B(1.2mm thickness) 9) Superior heat preservation ensured by 50 - 65mm polyurethane foam insulation laye |