uxcell Metal Book Loose Leaf Binder Hinge Snap Ring 2 Inch Inner Dia 3pcs Product Name : Loose Leaf Ring;Color : Silver Tone Material : Metal;Outside Diameter : 55mm/2.2" Inside Diameter : 50mm/ 2";Thickness : 3mm/ 0.12" Net Weight : 29g Package : 3 Pcs x Loose Leaf Rings