Five One Change rollerball cartridges with Ultra-Smooth tip for the optimum writing sensation. Suitable for Schneider One Change, Breeze, Base Senso, Base Ball and for the models of other manufacturers. Writing colour black. Line width approx. 0.6 mm, waterproof according to ink standard ISO 14145-2. The innovative Super-Flow-System guarantees consistent ink flow from start to finish. The Cap-Off ink does not dry up even if the pen lie open for 2-3 days and, besides this, is quick-drying and smudge proof.