Zebra 87322 EQ Refill for Z-Mulsion EX Ballpoint Pen, Medium, Blue

Had my Zebra pen for a year now, absolutely love it. If you are looking for a smooth gliding pen, this is it.

GREAT Pen refill. Could NOT use the pen, without it! THANKS to Amazon!

I don't know what Blue's issue is, but EVERY SINGLE ONE skipped ink, I don't know if the red plastic bit on the end of the pen just didn't come off, or there was a defect with the ball, or something, but every single one had the same problem. I managed to get one to work for a little while, and it is a beautiful blue, I just wish it worked better. Idk, maybe I got a defective one, because I ordered red and purple too and had no problems.