Square Steel Pole

4” square or 5” square. The product, along with our high pressure sodium lamp or metal halide lamp, can be applied in landscaping lighting. The product is anti-corroded by hot dip galvanization of both inside and outside of the pole. The process of galvanization includes acid-washing, hot dip galvanization, water-washing, phosphating, etc. With consistent gloss, the galvanizing coat is smooth and artistic. It also achieves without wrinkled skin, dripping, Zinc overlap, peeling and spot. The thickness of Zinc layer, which is beyond 86um, and adhesion of it are complied to national standard. As a result, the steel pole can resist corrosion more than 30 years.