Permanent Markers, Ultra Fine Point, Black, 40 Count, 0.4mm, Fine tip permanent marker set, quick dry, waterproof, fading resists, durable, marks ...

If you or your office team are constantly losing fine line markers, this is the box to get. They write with a nice, smooth, fine line. The barrel is as wide as a thick-line marker, so I'll probably run into a little confusion there, BUT I'd rather hold this nice wide barrel than a thin-barrel pen, so I'll deal with that. The box mine came in was corrugated cardboard (not thin paper stock) so it won't fall apart in the storage closet. I can't yet remark on how long they last, but if I discover there is a problem I'll come back to indicate that.

Who doesn't like pens? Well I'd have to say I'm only a semi-fan of these ones. I was hoping for more of a multi-use/daily writing but it bled through the paper in no time. That's just my personal nitpick, it still works perfectly, just wasn't what I was hoping for.

These pens are pretty good. They write rather boldly and can write on anything. It's sort of a problem that the ink bleeds out very quickly and easily from the pen so if you pause in your writing, it's easy for the ink to keep leaking out onto the surface and pool up into a dot. If on paper it's easy then for this to seep through to the other side so you'll have to be careful and write quickly. Due to how quickly the ink comes out, it actually makes thicker marks than you might expect. The tip does seem to be 0.4mm but the lines it writes are more toward 0.6 or 0.7mm I think.

Easy to use,

If you need a whole bunch of fine point markers, these will do. A short note scribbled on a post-it note stayed fast when subsequently exposed to water. The bleed through to the next post-it was negligible, a couple dots. I then tested writing on a waxed ice cream carton direct from the freezer. I was able to correctly label the carton, of course with the condensation it was easy to smear it a little. Note to the sellers, these are currently sold for 16 bucks for 40 units. You have that listed as 16 cents apiece, it's not that - it's 40 cents apiece. Still a decent price, but hey, fix your math.