Miquelrius notebook, A4 size (210 x 297 mm). Covers made of 0.8 mm opaque polypropylene, which is light and resistant. The continuous metal spiral allows the notebook to open flat and turn all the way around, featuring a coilock closure that prevents snagging. The inner paper is 70 g/m² extra opaque, preventing ink bleed-through and drying quickly. It contains 200 sheets with colored stripes on the side (8 colors, 25 sheets per color), ideal for classifying notes and using one color for each subject; includes a header for titles, is micro-perforated for a clean start, and has 4 holes for filing. The ruling is lined at 7 mm.