5/10/15/30x Metal Book Binder Rings 20-88mm Loose Leaf Album Locking Binding
Multiple sizes available. 20mm, 25mm, 30mm, 38mm, 45mm, 50mm, 55mm, 70mm, 88mm book rings. Widely used. 5/10/15/30 x Loose-Leaf Binder Rings. Easy to open or close. Closed tight and let your books organized.