Rollerball can be refilled with the exchangeable One Change cartridge with an Ultra-Smooth tip for the best writing experience. Line width approx. 0.6 mm, writing colour blue, 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 run dry even if the cap is removed for 2-3 days and, besides this, is quick-drying and smudge-proof. The One Change has a sturdy metal clip and a rubberised grip zone that provides a secure hold for relaxed writing. Specification Schneider One Change Ink Roller Line width approx. 0.6mm Quick-drying and smudge-proof Waterproof according to ink standard ISO 14145-2 Available in five ink colours: Black, Blue, Green, Red and Violet The cap-off ink does not run dry even if the cap is removed for 2-3 days Refillable with the exchangeable One Change cartridge with an Ultra-Smooth tip The innovative Super-Flow-System guarantees consistent ink flow from start to finish