... Plain,Serrated,I-shape Hot-dipped galvanized Steel Stair TreadsSpecifications1>Bearing bar pitch:30,40,60mm ... galvanized,Painted,UntreatedWe have wide range of Steel Grating in Plain/Serrated Type, Widely Applied ... special pitch according to clients material carbon steel,aluminum,stainless steel anti-crossive property anti-acid and alkali ... surface,with good anticorrosive property. Steel Stair Treads