This is the Scuba Dive Log Book Cordura 3 Ring Binder and Optional Log Book Inserts Features: Zippered, 3-Ring Log Book Cordura construction with reinforced plastic inner sleeve These 3 ring, zippered books measure 71/2 x 10" and hold PADI and most other log books Purchase empty or with a 66 page tabbed log book package This is a quality log book with inserts making your dive experience easier and organized