Wanhao i3 plus or Monoprice IIIP filament holder upgrade

This is a spacer for the Wanhao i3 plus or Monoprice IIIP printer filament spool holder. It is designed to let you replace the very poorly designed original spool holder with standard 3/4" PVC schedule 40 pipe.

I found that the original spool holder was not wide enough to accommodate many of the wider spools of filament that I had, and the stand is too short to accommodate the larger diameter spools.

I solved both of these problems by replacing it with a very simple bit of 3/4" PVC pipe.