Rollerball with Ultra-Smooth tip for the best writing experience. Line width approx. 0.6 mm, waterproof ink 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. The One Business has a sturdy metal clip and a rubberised grip zone that provides a secure hold for relaxed writing. Go see in the 'Specifications' section below the PDF file to have a closer look at the Ultra-Smooth tip. *Non-refillable*