Material:Mild Steel or Stainless Steel Surface Treatment: Untreated,Painting or Hot dip Galvanizing. Widly used on construction project,oil project,seaport,power ... ,ice snow and dust.Material:Mild Steel (Low Carbon Steel) or Stainless SteelSurface Treatment:Untreated,Painting or Hot dip GalvanizingSteel grating standards:A)China ...