Let me say first up, if you're looking for a professional pen set, look somewhere else. That aside, this is a pretty good amateur set.This pen set comes with 8 assorted pens, as advertised. One is a "thin" felt tip (thicker then most ball tip pens), a medium felt tip pen, and 6 marker tip pens, which are only different from each other thanks to the ink tone, which ranges from light gray to pure India Ink black.If you're not used to drawing with pens, this is a great set to start out with. Practice a bit, and you'll be making some fine art in no time. If you're more on the experienced side, well, you don't really need ME to tell you what to do.Haven't been able to tell if they're refillable or not. The back end rotates, but I'm too scared of making a huge mess to try to pull it off. Guess I'll find out when the ink runs out in one of them, but this is a great value either way.