SODIAL(R) 50 Pcs Staple Book Binder 20mm Outer Diameter Loose Leaf Ring Keychain 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