1cm radius disk with M3 hole in the middle

For my delta, the top pulley are supposed to be comprised of a flanged bearing. However, I had a bunch of 9mm diameter x 4mm wide bearings with m3 holes in the middle, which fit the bill with the exception of missing flanges.

I created a flanged spool that lets you slide in the bearings, but have come up with something simpler. These simple discs with M3 holes in the middle.

I printed out 6 of them at 100% infill. They are 1cm in radius, 1mm thick, and have an M3 hole in the center.

Bas