4mm PTFE Filament Guide with bowden coupler

This is a remix from the Wanhao PTFE_Filament_Guide_and_Sponge_Cleaner_V2:
https://www.thingiverse.com/thing:2685750
I enlarged the hole to fit in a 4 mm PTFE tube and to screw in a bowden coupler I had left from an old E3D-V6 clone (https://www.gearbest.com/3d-printer-parts/pp_613793.html). This should give you a tight fit on the PTFE tube.

Enjoy!