Ink cartridges, you think ... what's up there already a lot to say. Well, these are simply good ... color is beautiful "royal blue", they are the inks "killer" erasable, fit perfectly into the Lamyfüller and have a fairly large "Range" (of which I am always amazed, because as a Calligraphy consumed surely more ink than a "normal" ?!). And the best thing about the story is that they often get in the offer, well below the 1.75 euros, which are marked on the package. Since even the no-name competitors can not, by the way, as I have already established, is sometimes even more expensive ... Buy recommendation ... and you want to get to try something different ... there are a few other beautiful colors. My favorite is currently Turquoise!