Filament Spool Retainer

This is a Filament spool spacer I created so that my spools ran centred on the spool holder and not just loosely (I had been having issues with spool running away on occasions). Obviously you will need 2 of (one for either side of the spool).
I have found that my filament spools off in a much more controlled fashion with these.
The centre holes suit 16mm dowel or rod and the 'cones' suit filament spools with hole diameters between a little over 30mm and a little under 60mm.
I have also included so retainer blocks that you can slide on your rod/ dowel as if the fit of the cones on the rod is a bit loose they do have a tendency to slide out.