Standard Size International Ink Cartridges: Length Approximately 1.5” – Base Diameter Approximately 0.24”
Good Value: 12 Cartridges per pack: The 12-pack conveniently features 12 international standard size ink cartridges to fit almost all fountain pens on the market.
Neutral Ph & Non-toxic formulation: Ink has been carefully manufactured using only natural dyes giving the composition a neutral, natural, and non-toxic pH.
Smooth & Uninterrupted Ink Flow: With no break in ink flow, enjoy a smooth and optimal writing experience as your fountain pen glides elegantly across paper.
Quick To Dry: Private Reserve fountain pen nib ink pen refill takes only a few seconds to dry ensuring your important writing moments are not ruined by smudges or smears.
Private Reserve Fountain Pen Ink Cartridges, Cosmic Cobalt12 mini cartridgesStandard international size1.5" long x .25" diameterExcellent coverageSmooth flowVibrant colorNeutral pHNon-cloggingFast dryingThe cartridges fit the following brands (compare your cartridge size to be sure as not all models take this universal cartridge):Acme, Ancora, Bossert & Erhard, Bexley, Caran d'Ache, Cartier, Colibri, Conklin, Conway Stewart, Daniel Hechter, DaniTrio, David Oscarson, Delta, Elysee, Faber Castell, Itoya, Jorg Hysek, J.P. Lepine, Lalax, Libelle, Loiminchay, Marlin, Michel Perchin, MontBlanc, Montegrappa, Monteverde, Nettuno, Northpoint, Omas, Pelikan, Recife, Regal, Retro 1951, Rosetta, Rotring, S T Dupont, Sensa, Sheaffer, Signum, Stipula, Taccia, Tombow, Visconti, Waterford, Yard-O-Led & many others.These cartridges DO NOT FIT pens that take proprietary cartridges: Parker, Sheaffer, Cross, Waterman, Aurora, Lamy and Pilot.Available in 45 colors in bottles and 44 colors in cartridges - check our store for the full selection