Expandable top and bottom loading pressboard binder for any size project. The sturdy, retractable storage hooks hang from single point, hanging racks or standard hanging files. The convenient and adjustable posts allow for maximum paper capacity while using minimal storage space. Pressboard binder is designed for use with unburst sheets that are still attached in continuous form with accordion fold. Binder Type: Post; Binder Style: Non-View; Binder Size Capacity: 6"; Binder Color(s): Blue.