Snap On Filament Guide

This snap on filament guide will fit Cocoon / Wanhao printers with a top bar measuring 49mm top / 50mm front. It is vary easy to mount as you place the top hook on and push down to "snap" it into place. This design allows for some sliding along the gantry to move with the print head and keeps the filament from rubbing on the frame when your prints get high.

Also fits between the parts of my spool holder:
https://www.thingiverse.com/thing:2810638

* edit Mar 4th 2018
I've also added a slimmer guide for if you have slim spools and are using the spool holder as well.