High quality steel (Q235 or Q345), thickness is 3-4mm. Galvanizing: thickness is 86μm or more. Powder coating (Dupont uv-resistant powder), thickness is 80μm or more. Excellent hot-dip galvanizing and cold-processing technology, from unrolling , straightening, leveling, cutting, molding, continuous welding, hot-dip to finishing. Wind resistance velocity: 80-160km/h.