These are brand new authentic Cross cartridges for all Cross cartridge fountain pens. Cross is one of the few fountain pen manufacturers that use their own type/standard/shape proprietary cartridges, so only these cartridges work with Cross pens. This is a highest quality ink, great flow, consistency and viscosity, easy to clean as its water based, does not stain the pen or react chemically with its parts if left inside even for decades.

* Size: Standard Cross Size
* Fits: All Cross Fountain Pens
* Ink Color: Blue
* Ink Type: Water Based
* Good for at least a month of writing