Boxed set of 8 Sailor Shikiori Yukiusagi fountain pen ink cartridges. A blue fountain pen ink thatrepresents the happy hopping of a bunny, forgetting the cold in the excitement of fresh powder snow, with colors inspired by the bunnys ears and shimmering snow. These proprietary cartridges fit allSailor cartridge/converter fountain pens (except the Chalana). Each cartridge is labeled with the name of the ink, and a directional arrow indicating how to insert the cartridge into your pen.