... after welding, after welding the first hot-dip, first PVC coated after welding,3. Features: vertical wall thickness of ... , easy installation.4. Cylinder surface treatment: galvanized and PVC plastic bag, through this two ways of surface treatment, not only ... .5Finishing of fenceElectro galvanized,hot dipped galvanized,PVC coated,electro galvanized then PVC coatedThe colorBlue/green/deep green/white/red ...