Uni Ball never disappoints in the Power Tank, and you can usually find various
size tips here on JetPen. Sometimes the Jetstream ballpoints sometimes quit on
me, rather than run out. This one wont. I found one other pen that accepts this
pen's cartridge if you don't like the grip. But I forgot which. It's probably a
quarter inch longer than standard.
Love that the refills are reliable!! Until I found Jetpens I bought pens over
and over again!! Now I have found a fabulous writing utensil and can just buy
refills I trust to work. I have actually worn 1 pen completely out!! Been a big
fan for 4 years now!!