Pilot Hi-Tec-C Coleto Multi Pen Ink Cartridge - 0.3 mm - 10 Color Set

These are awesome! Brilliant colors, smooth flowing ink, and all fitting neatly within a multi-pen body. I think I'm in pen-geek heaven!

the ink works really well..smooth...love it..
wondering if there is .5mm available...

I love the idea of getting 10 different colors in one container. I like being able to change colors when ever the mood hits. I plan on buying all of the other color cartridges that did not come in this set in the next couple of weeks. GREAT PRODUCT.

this isn't a review, i actually have a question!
are these ball-point or gel?

I've had these pens for about 9 months in both the .3 and .4 sizes. I purchased all the colors in both sizes. All but one of the ink cartridges has segmented out the clear gel and ink so that I can no longer write with the pens. They are always stored horizontally, but somehow the clear gel is now between the ink and the pen tip. Do not buy, they are not nearly as good as the normal Hi-Tec-C pens. Previous to this happening I loved them and used them all the time. REALLY angry at the amount of money they wasted.