Description : Lends expression to any writing or drawing ideal for calligraphy, taking notes in a journal or diary, and official business. This ink cartridge attaches to the back of the fountain pen feed and supplies the pen with ink. When the ink cartridge runs out of ink you simply remove the empty cartridge, throw it away and insert a fresh one. Convenient and Mess free fountain pen ink cartridges ink cartridges they are easy to carry and easy to use. Filling the pen does not require dipping the pen in an ink bottle. These ink cartridges work with the following pens: Acme, Ancora, Bexley, Bosserrt & Erhard, Caran d'Ache, Cartier, Colibri, Conklin, Conway Stewart, DaniTrio, Daniel Hetcher, David Oscarson, Delta, Diplomat, Dunhill, Elysee, Faber Castell, Inoxcrom, Itoya, Jean Pierre Lepine, Jorg Hysek, Kaweco, Krone, Latex, Libelle, Lominchay, Marlen, Michel Perchin, Montegrappa, Monteverde, Nemosine, Nettuno, Northpointe, OMAS, Osmiroid, Pelikan, Recife, Reform, Retro 51, Rotring, Schmidt, Schneider, Sensa, Sheaffer, Signum, S.T. Dupont, Stipula, Stypen, Taccia, Tombow, Underwood, Visconti, Waterford, Waterman and Yard-O-Led.