I have said many many tikky graphic that replace Xonox, I'm embarrassed to not have to put a 6th star. The Xonox has advanced much more resistant than tikky graphic (which is a felt while Xonox has a ball) and especially its black ink is really: where tikky graphic produced a very dark gray, the product actually Xonox a black ink of China. In short, rotring demonstrates his mastery by producing a disposable pen to simply exceptional qualities.
Note, however, I found information explaining that Xonox are no longer manufactured since 2007. So is this info is wrong (in which case why are they so hard to find) or pens sold here already 6 years age. I lean toward the second hypothesis, given the packaging does not seem very modern (yet they work perfectly). So it only remains to make our own stocks of these fantastic pens.
