The Schneider Rollerball "One Business" is equipped with an Ultra-Smooth tip for the best writing experience. The line width is approx. 0.6 mm and the rollerball ist available in black, red, blue, green ink. According to ink standard ISO 14145-2 this ink is waterproof. The innovative Super-Flow-System guarantees consistent ink flow from start to finish. It is great for notes and signatures or for visualizing. 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 Business has a sturdy metal clip and an ergonomically rubberised grip zone that provides a secure hold for relaxed writing.