PTFE Collet clips. I used the MIKA3D Silk Copper because I was at the end of the spool and didn't feel like changing out. In the future, I would probably use Hatchbox Black.
I would also probably change the quality from 0.2 to 0.16 just to clean it up a bit, but overall, these work great on the extruder side of the bowden. Tight enough fit that there is no movement.
I was not able to get the Customizer to save the file, so I used OpenSCAD to modify the dimensions in the .scad file for what I needed, then sliced in Ultimaker Cura. I have included the .scad file as well.
Creality
Ender 3
No
No
0.2
100%
MIKA3D
Silk Copper
PLA