This pressurized, waterproof blue ink refill cartridge is compatible with Inka pens and gives them their unique ability to write upside down and in extreme conditions and altitudes.
- Compatible with all Inka pens
- Waterproof blue ink
- Pressurized cartridge writes upside down and in extreme conditions
|Dimensions:||0.300in x 2.000 in x 5.900 in|