fence pre-galvanized or aluminum powder coated, fully welded anti-rusting and UV. much longer time using life material:tube. fenceSIZE: 400mm-3000mm.MATERIAL: pre-galvanized steel tube, aluminum tube, D-shape steel, W-shape steel, any shape metal.PURPOSE: Pool fence, residential fence, garden fence, balcony and stairs fence, and so onCERTIFICATE: ISO9001