Pilot's everyday fountain pen ink cartridges, five to a pack. They're made in Pilot's own cartridge size, so they fit Pilot pens like the Kakuno, Metropolitan and Prera, and not pens from other brands.

Changing one takes a few seconds: unscrew the barrel, push a new cartridge onto the nib section, clear end first, and screw the barrel back on.

Why people love it
- Quick, clean refills with no bottle to open
- A spare pack slips easily into a pen case
- Fits the Pilot fountain pens you're most likely to own

Details
- Ink: water-based fountain pen ink
- Fits: Pilot fountain pens that take Pilot cartridges
- Pack: 5 cartridges
- Model: IRF-5S