Bar for spool holder (200g spool) - Prusa i3

I found a [spool holder](https://www.thingiverse.com/thing:629576), but I did not have something to hold it.

I'm using [eFilament3d](http://www.efilament3d.pl)'s 200g spools for multiple colors. These spools have a small hole, so I needed a small bar for it.