Schneider One Business Roller Ball Pen Single Piece, features an ultra-smooth tip for an optimal writing experience,. This pen, with a line width of around 0.6 mm and blue, waterproof ink (ISO 14145-2 standard), is ideal for notes, signatures and visuals. The revolutionary Super-Flow-System ensures continuous ink flow from beginning to end. Its enormous ink reservoir has a level indicator, ensuring that every drop is used efficiently. The cap-off ink remains fresh even after being left uncapped for 2-3 days. The One Business Rollerball Pen has a robust metal clip and an anatomically rubberized grip zone, ensuring a stable and pleasant writing experience.