... Excellent quality, competitive price and timely shipment Hot dip galvanized serrated steel flat bar gratingProduct infoa. Material: Q235B, A36, SS400, S235JR, SS304, SS316 ... : Hot DIP galvanized, painting, acid washing and polishing for stainless steel grating.k. Cross bar type: Round bar, I bar, twisted bar, twisted square bar. Flat bar type ...