Quill-Style 9550 Black XF Rollerball Refill [5285 Black XF]-two pack

They know their stuff. I have old discontinued steel barrel PaperMate pens, and some old Quill brand pens. The Quill 9550 refills fit the PaperMates. So I went out on a limb, basic Google search, and found these folks. These refills worked perfectly.They know what they're doing, give them a shot.

Fits well and writes well.

I use it to write with a pen that fits nicely in my hand

Perfect fit for my special pen awarded at my job!!

as expected

This refill number is what came wirth my Quill roller ball pen. Works great