Notebook. Durable, reusable protective cover with interchangeable paper insert. Ready to use, filled with holding and closure elastics. Format: A5, with 40 sheets (80 g/m²) graph paper 5 x 5 mm. Wood-free paper with rounded corners. Available in black and red. With this notebook from Herlitz, you can customize your notes to your liking. The notebook features a changeable cover and rounded corners. The first 40 sheets are included in the notebook but can be individually expanded and swapped out, as they are simply held in place with an elastic band.