Material: Q235B Steel (Chinese standard steel), SS304, SS316 & SS316L Material: Q235B Steel (Chinese standard steel), SS304, SS316 & SS316LSurface Finish: Electro zinc plated – for indoor use to BS EN 12329-2000, 12microns thick.Powder coated - for indoor use to JG/T3045-1998, between 15 and 20 microns thickHot Dipped Galvanized – for outdoor use to BS EN 1461-1999, between 60 and 80 microns ...