The Pilot V-Ball grip VBG-7 black rollerball pen has a writing width of 0.4mm and a ball width of 0.7mm. You can write smoothly with this pen, thanks to the rubber grip. The ink supply is controlled by a capillary system, through which the ink is gradually guided to the pen. This optimal dosage of liquid ink gives this Pilot roller pen a fountain pen feeling. The pen has a click cap.