Description A pack of 6 Sailor empty fountain pen ink cartridges. Sailor fountain pen ink cartridges are proprietary, and only fit Sailor fountain pens that accept cartridges. Now you can refill cartridges with your favorite ink, without the hassle of emptying and cleaning out used cartridges!Each cartridge has the capacity to hold 1.5 times the capacity of a standard Sailor ink Converter. These also work with the new Sailor Fountain Pen Maintenance Kit.