Hard to Find Sheaffer Cartridge II ink cartridges. These are the cartridges required for (among others):
SLIM TARGA FOUNTAIN PENS
FASHION I FOUNTAIN PENS
TRZ FOUNTAIN PENS
Since the converters for these models are expensive and virtually impossible to find, these dried-up (but unpunctured) refills can save the day as they can be refilled with ink via a syringe.
This listing is for two un-opened cartridges, colors vary.