Case of 6 blue ink cartridges for the Traveler`s Fountain pen. It has a standard size, but is recommended only for the Traveler`s brand.
Before changing the cartridge, clean the pen by following these instructions:
1.- Grasp the tip and unscrew the barrel in an anti-clockwise direction.
2.- Remove the empty cartridge by pulling it outwards.
3.- Place the tip of the pen upwards and insert the small end of the cartridge directly into the cartridge.