The ultra-smooth tip provides the best writing experience for fast and efficient work. The new generation of rollerball pens is introduced with the "One" series. The Free-Ink Super-Flow System ensures a consistent ink flow from beginning to end. The regulator system compensates for temperature and air pressure fluctuations, preventing the pen from leaking. Rollerball pen with a hybrid conical tip for pleasantly smooth writing. High-quality metal clip. Ergonomically rubberized surface. Cap off, can remain open for 2-3 days. Document-proof according to ISO 14145-2. High writing performance is guaranteed.