The 'One' series from Schneider is set to be the next generation of rollerballs. Its 'super flow' system ensures a consistent flow of ink, and a regulating system balances out deviations in temperature and air pressure, protecting the pen against leakage. One Business has an ultra-smooth 0.6mm tip. Waterproof ink suitable for documents (ink standard ISO 14145-2). Cap-off ink does not run dry even if the cap is left off for 2-3 days. Large ink reservoir with level indicator. Rubberised ribbed grip area. Strong metal pocket clip. Liquid ink roller with Ultra Smooth tip for the best writing feel. Line thickness: approx. 0.6 mm Purple ink color Super Flow system ensures consistent ink flow. The cap-off model can be left open for 2-3 days without drying out High volume ink with level indication (not refillable) Ergonomic rubberized grip for a secure, relaxed grip