... 3.excellent quality of steel grating 4.reasonable price hengzhou 's steel grating can be used for ... offter the excellent quality of stel grating and good price .Grating Dimension Bearing bar pitch(mm)12.5 ... ,sidwalks,filter grates,ventilation grates,driling stages, ladder steps,ditch grates,fences,framedgrates,trash rack grates ... which 50mm and 100mm are recomended . price aluminum step ladders