Pack of 20 A5 White Paper Over Board Ring Binders by Janrax. These durable ring binders feature a standard 2 O-ring mechanism with a 25mm capacity for filing A5 documents. 35mm Spine. The ring binders also feature durable paper over board covers and spine label for quick identification of contents. Available in a range of colours from the Janrax range, ideal for colour coordinated filing.