The Dive Logz Log Book features Unique, Original Artwork, this Classic Hammerhead is a great looking log. The Log Books pages have UV-Coating for Durability and a Durable Water Resistant Cover. 50-Standard, Simple Easy-to-Use Log Pages, with lots of space for Verifications and Stamps. Useful Diver Information, Equipment Check-Lists, Notes, Record Nitrox and Cumulative Dive Times and more on each page of this Eye Catching" Log Book. Log Book is Standard Sized and Binder-Friendly with pages measuring (W x H) 5.5" x 8" (14 x 20.3 cm) and Pre-Punched for easy Insertion in a Binder.