The Faber-Castell logo is engraved on the end cap
The bottle has a conical end to allow your pen to get every last drop of ink
it is exceptionally waterproof and lightfast
The T1 is a screw-top pen with an aluminum cap and end section
The Maximum Diameter : 12mm
J. Herbin Fountain Pen Ink Cartridges [Tin of 6] Color:Gris Nuage The Faber-Castell logo is engravedHerbin is the oldest name in pen inks in the world. M. Herbin created The Jewel of Inks in his shop on the Rue des Fosses Saint Germain in Paris in 1700. Herbin uses all natural dyes in their fountain pen inks. This natural composition is reflected in the very neutral pH of the inks. Cartridges Universal snap in cartridges. (Fits all pens except Waterman, Sheaffer, Parker, Lamy, A. T. Cross, Pilot Namiki, Sailor, Platinum, Aurora, Fultz and Nakaya) 6