... Excellent quality, competitive price and timely shipment Hot dip galvanized serrated steel flat bar gratingProduct infoa. Material: Q235B, A36, SS400, ... washing and polishing for stainless steel grating.k. Cross bar type: Round bar, I bar, twisted bar, twisted square bar ... . Flat bar type: Plain or serratedType Bearing barflat barserrated flat barI barSerrated I ...