The international standard format of the fountain pen cartridges ensures that the small ink cartridges are suitable for Kaweco fountain pens as well as many other cartridge fountain pens. The Kaweco ink cartridges are available in a multitude different colours such as the classic royal blue and in other colours such as caramel brown, summer purple, paradise blue and much more. Pack of 6 cartridges of 1 ml. The production is carried out by hand and individually inspected in the pencil city of Nuremberg. First-class quality functionality and best service have always been at the forefront of our philosophy.