1.75mm Bowden Coupler
By Matthias Lewen
Free
It's free to download
Videos
Images
Documentation
Technical
Bowden Coupling from e3d (just the plastic part):
http://e3d-online.com/E3D-v6/Spares/Embedded-Bowden-Couplings-For-Metal-1.75mm-Filament
Related objects
Free