Keep your checklists, reference data, pens and Green Book all in one place! This dual-function notebook cover is designed to fit the US Military's standard issue 5" x 8" Army Green Book - NSN 7530-00-222-3521. Allows for simultaneous use of the green book and our checklist booklet so that you can reference your checklists (such as 9 Line Medevacs, IED Reports and other SOP lists) whilst still being able to easily take notes.