... pitch;50,100mm Plain,Serrated,I-shape Galvanized,Painted. Stair Treads Steel GratingSteel Grating, Bar Grating, Serrated Steel GratingMaterial ... , foodstuff factory, transportation, municipal administration, parking lot, etc Stair Treads Steel Grating Standard of steel grating: NoItemDescription1Bearing bar25x3,25x4 ... Angel(Export Manager)Mob: +86- 132 7317 7087 Stair Treads Steel Grating Manufacturer