Standard international thumb|Dimensions of short International Ink Cartridge Most European fountain pen brands (for example Conway Stewart, Caran d'Ache, Faber-Castell, Michel Perchin, S.T. Dupont, Montegrappa, Stipula, Pelikan, Montblanc, Europen, Sigma, Delta, Italix, and Rotring) and some pen brands of other continents (for example Acura, Bexley, Esterbrook, Retro51, Tombow, and Platinum (with adaptor)) use so called "international cartridges" (AKA "European cartridges" or "standard cartridges" or "universal cartridges"), in short (38 mm in length, about 0.75 ml of capacity) or long (72 mm, 1.50 ml) sizes, or both. It is to some extent a standard, so the international cartridges of any manufacturer can be used in most fountain pens that accept international cartridges.
Standard international thumb|Dimensions of short International Ink Cartridge Most European fountain pen brands (for example Conway Stewart, Caran d'Ache, Faber-Castell, Michel Perchin, S.T. Dupont, Montegrappa Stipula, Pelikan, Montblanc, Europen, Sigma, Delta, Italix, and Rotring) and some pen brands of other continents (for example Acura, Bexley, Esterbrook, Retro51, Tombow, and Platinum (with adaptor)) use so called "international cartridges" (AKA "European cartridges" or "standard cartridges" or "universal cartridges"), in short (38 mm in length, about 0.75 ml of capacity) or long (72 mm, 1.50 ml) sizes, or both. It is to some extent a standard, so the international cartridges of any manufacturer can be used in most fountain pens that accept international cartridges.