... Serrated Bar; I Type Bar Material: Carbon steel, stainless steel, Aluminum no Metal Grating Type: Plain Bar; Serrated Bar; I Type ... BarMaterial: Carbon steel, stainless steel, Aluminum nodular cast iron, ... Mild SteelSurface Treatment:Un-Coated, Painted, Hot GalvanizedQuality Control:Steel Grating standard: CHN - YB/T4001-1998USA - ANSI/NAAMM ( ...