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Standard Size Ink Cartridges for Fountain Pens

\Standard Size\ cartridges (often also called \International\ or \International Standard\) are generally used in pens that do not take proprietary cartridges (ie not Lamy, Parker, Aurora, Sheaffer, Pilot/Namiki, Sailor or Cross). Standard size cartridges are 38mm (1.5in) long and taper towards the part that goes into the nib unit (grip section).
Please refer to this page for more information.