Polycarbonate Fountain Pen Ink Cartridges 4 Piece Blue Black

*This item is only available for shipping from Spring to Early Fall due to the possibility of the ink cartridge exploding in cold temperatures. 

This refill can be used with our Polycarbonate Fountain Pen. Includes 4 cartridges.

How to replace the cartridge: Remove the cap, rotate the lower shaft counterclockwise to remove it, and pull out the ink cartridge while turning it. Insert the stainless steel ball side of the ink cartridge from below with the pen tip facing up.