Material:galvanized steel

Detail data: Diameter Φ80mm,Φ100mm,Φ125mm,Φ150mm,Φ160mm,Φ180mm,Φ200mm,Φ225mm,Φ250mm,     Φ315mm,Φ355mm,Φ400mm,Φ450mm,Φ500mm,Φ560mm,Φ630mm,Φ710mm,Φ800mm,Φ900mm...