Ink roller with Ultra Smooth tip for the best writing feel. Stroke thickness approximately 0.6 mm, black ink colour, indelible to ISO 14145-2 standard. The innovative Super Flow System ensures ink flow from start to finish. The large volume of ink can be controlled by a window and thus used completely. The cap-off can be left open for 2-3 days without drying. The One Business has a high quality metal clip and a rubberised ergonomic grip for a secure and relaxed grip.