Here is a list and some links of the kind of gel pens and Sharpie markers that work with these holders.
The Chomas Creations mini gel pen holder can use the 20 different colors of Chomas Creations mini gel pens, or the 12 pack of Staples brand mini gel pens for a total of 32 different colors!
The Chomas Creations mini gel pen holder is available for the Cricut or the Silhouette.
We have added the Chomas Creations mini gel pens in 2 different 10 packs!
The glitter 10 pack of mini gel pens...
Staples has a 12 pack of these for $5 in store, they are the Staples brand. Here is a link where you can get them online (for some reason they are $.50 cheaper in the store). Mini gel pens from Staples
The Chomas Creations mini Sharpie holder is available for the Cricut and the Silhouette.
For the mini Sharpie holder, these are what you use...
If you go to their site, you can see all the colors they come in! Mini Sharpie marker colors
And now for the last one, the micro Sharpies! The micro Sharpie holder is only available for the Cricut.
This is what they look like, notice the point is VERY fine, works great with very detailed images...
You can see all the colors they come in here... Micro sharpie colors