These are simple clips to hold two cables together.
Usage examples:
PLA and PETG work very well. Printed with 10-20% infill, layer height 0.2 or 0.3 mm depending on the look you want (smaller layer height equals smoother look).
On my Prusa MK3S+, printing takes approx. 15 min per clip.
The file names indicate the cable diameters in millimeters:
The author marked this model as their own original creation.