30mm ID Filament Spool Reel

This is a filament spool reel designed to be used with filament spools that have an internal diameter of 30mm (such as those sold by Bilby CNC). Designed to be used with top mount spool holders such as the 'Modular Replicator 2 Top Mount Spool Holder' by EKS Designs (http://www.thingiverse.com/thing:139318). Has in internal hole to fit on a 3/8" threaded rod.

Print two, then loosely hold in place with some 3/8 wingnuts to prevent lateral movement along the rod.