D shape file ring/3 D ring file binder material: iron color: nickel length: 208mm width: 26mm inner diameter: 40mm outer diameter 48mm height: 53mm binding thickness: 40mm ring distance: 70*70mm rivet distance: 200mm packing: 160pcs/ctn Item: 3 ring clip Material: metal/stainless steel Color: nickel/black/golden Length available: 190/210/216/241/263/280MM. Inner diameter available: 15/16/17/19/20/23/25/30/32/38/41/45/50/65/78MM. Width available: 15/17/20/26/36MM Shape of ring: D shape, Q shape, O shape (R shape), tilted D shape Trigger open or pull open.