column Approved :ISO 9001:2000 Fifteen years factory experience Ten years no rust column1. Material: high quality low carbon steel wire, square steel, round steel, angle iron.2. Product types: first plating after welding, after welding the first hot-dip, first PVC coated after welding,3. Features: vertical wall thickness of 1.00mm, sheet metal forming and hot rolling through cold-formed, its ...