Flashforge Dreamer OmniStand Spool 32mm
This is a spool sleeve for the OmniStand Adjustable Filament Spool Stand, as found here: http://www.thingiverse.com/thing:652415
This sleeve has a 32mm outer diameter, which fits the Hatchbox filament spools a little tighter (although the 29mm sleeve works fine too).
This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/dvhwS9NiHyz