The ruked Oxford Office Essentials A4+ spiral-bound notebook, made of refined premium 90g Optik Paper® is easy to use and ideally suited to calmly make notes. It is spiral-bound and has a sturdy cover in reinforced card. Due to the 4 hole punching you can use it in many different ways. The + stands for the optimised format so... that every single page is in the format A4 even when you detach it