Uxcell Book Binder Loose Leaf Rings Keychain Key Ring, 5 x 1.8-Inch Diameter Product Name : Loose Leaf Ring; Color : Silver Tone Material : Metal; Outside Diameter : 45mm/ 1.8" Inside Diameter : 39mm/ 1.5";Thickness : 3mm/0.1" Net Weight : 38g Package : 5 x Loose Leaf Rings