9 hole round ring mechanism/ring binder clip file item code: TR253-9-20/20 material: iron color: nickel/gold length: 262mm width: 20mm inner diameter: 20mm outer diameter: 24mm height: 24mm binding thickness: 14.5mm ring distance:19.0519.0519.0550.819.0519.0550.819.0519.05mm rivet distance: 196.85mm packing: 250pcs/ctn