Uxcell Binder Loose Leaf Ring Keychain, 20mm Outer Diameter, 50 Pieces Product Name : Loose Leaf Ring; Material : Metal Color : Silver Tone; Outside Diameter : 20mm/ 0.8" Inside Diameter : 16mm/ 0.63"; Thickness : 2mm/ 0.08" Net Weight : 74g Package : 50(+/-2%) x Loose Leaf Ring