What you get: the package contains 60 pieces fountain pen ink in this package, there are different colors for you to use and change, you can replace or fill you pen conveniently, and the sufficient quantity will satisfy you various needsProper size for you: our pen ink cartridges measure approx. 2 inches/ 5.1 cm in the length and the diameter is 0.28 inches/ 0.7 cm, please notice that the bore diameter is 3.4 mm, which is standard international size for you to replaceSmooth write experience: this fountain pen refill slides smoothly on the paper, you will write fluently and the replace the ink cartridge can help you to save a lot of trouble; The ink takes only a few seconds to dry ensuring your important writing record are not ruined by smudgesSuitable occasions: with these short international standard size cartridges, they are suitable for daily writing use in school, office, home, you can also use them to make card, write letter, make crafts and so on; These pen ink cartridges are also fit for rewarding someone in learning progressNice gift choice: you can present this fountain pen ink to yourself as backup, you can also send to your sisters, brothers, relatives, colleagues as a gift at Thanksgiving Day, birthday, graduation, family gathering, holiday or other occasions