♦ It adopts high-quality hot-dip galvanized steel, and all the components are processed using galvanized after the first welding process. 

♦ Quality assurance is 20 years. The amount of zinc attached is greater than 490 g / ㎡ and its thickness is greater than 70 microns. 

♦ All components are assembled on site, connectors and fasteners are stainless for 20 years.