PILOT V5 Ink Cartridge  (Pack of 6, Ink Color - Blue)

The Pilot V5 Hi-Tecpoint Cartridge System Roller Ball Pen is the first liquid ink pen with a cartridge system. What sets it apart from other refillable roller balls is that the tip and ink feed don't have to be replaced each time the ink is refilled. Instead, it uses ink cartridges, similar to a fountain pen. This makes this pen more cost effective and environmentally friendly since you're throwing less of the pen away every time you refill it