This walk-in tunnel greenhouse is made of galvanized steel and features a waterproof PE cover. It provides excellent air ventilation with 8/12/6 mesh windows and has a reinforced structure with 1/3 top beam and 2/4 diagonal poles. The greenhouse is easy to assemble and comes with all necessary tools, including connectors, screw covers, ropes, stakes, and guy ropes. It is ideal for cultivating vegetables, flowers, and creating beautiful landscapes, and protects plants from the cold, frost, and hail in winter.