Pack of 6 green disposable ink cartridges for Pilot fountain pens. They are proprietary, so they will only fit Pilot pens.
Will fit in the Pilot Kakuno, available in Clear and White/Blue
Ohto C-305p Ceramic Rollerball Pen Refill - Black
Ohto Pen .7mm refill for Needle Point Horizon
Kaweco Pearl Black Fountain Ink Cartridges
Kaweco Royal Blue Fountain Ink Cartridges
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