... 3.material saving:slip-resistant&safe hot sale steel grating combined 1) Bearing bar ... mild steel or stainless steel.6) Surface treatment: untreated, painting or hot dip galvanizing.7)Steel grating ... steel & Low carbon steel, etc5Surface TreatmentBlack, self colour, hot dip galvanized, painted, spray coating 6Grating StylePlain / Smooth, Serrated /teeth, I bar, serrated I bar hot sale steel ...