As we know, in order to facilitate transportation and save costs, most of the products on the market have adopted the folding design. But our product is unique, innovative and the world's first pull-out design. Original creative extend-retract frame, out of the ordinary. Lightweight structure, less 30% weight and 50% packing volume compared to other competitive products on the market. Saving more about 50% space, saving more about 50% transportation charges,saving more about 50% warehouse charges. The compression of transportation cost wil make it cost-effective Industrial grade, outstanding appearancel; Surface oxidation treatment.; A variety of colors can be customized; Waterproof and corrosion resistance.