Rollerball with Hybrid conical tip for pleasantly soft writing. Line width approx. 0.5 mm, writing colour blue, waterproof according to ink standard ISO. The innovative Super-Flow-System guarantees consistent ink flow from start to finish. The large ink reservoir has a level indicator and every drop of ink is used. The cap-off ink does not run dry even if the cap is removed for 2-3 days. The One Hybrid C has a high-quality metal clip and an ergonomically rubberised surface that provides a secure hold for relaxed writing.