The Kaweco M grey M 6-refill set offers a discreet and elegant graphite nuance for minimalist writing. The set contains 6 universal short cartridges with quick-drying smoky grey ink that creates subtle gradients and shadows on paper. They work perfectly in the Kaweco line and in nib pens compatible with the international cartridge standard. The modernity of the neutral grey color is the ideal option for illustrators, urban sketching, and anyone looking for a sober and contemporary alternative to traditional black ink.