Leuchtturm Pen Loop Everyone can finally decide for themselves whether a notebook or calendar requires a pen loop. The pen loop is simply attached into the cover at the back. The ideal solution for every notebook and calendar: simply affix the Pen Loop to the inside back cover. Pen and pencil loop made of a strong elastic strap. For thin pencils or thick fountain pens. The pen and pencil loop is self-adhesive and can, if desired, be stuck to the inside back cover of the notebook. Size: 40 x 40 mm, 15 mm elastic loop.