J. Herbin Ink Cartridges are international (universal) size to fit many fountain pen brands, except Waterman, Sheaffer, Parker, Lamy, A.T. Cross, Pilot/Namiki, Sailor, Platinum, Aurora, Fultz...
Sailor's water-based ink cartridges are compatible with all Sailor fountain pens. Pack comes with 12 inks cartridges.
Available in black, blue, and blue/black.
Kaweco Ink Cartridges are compatible with small international ink cartridges, including Kaweco Sport fountain pen. Packs of 6 cartridges offered in 10 colors:
