Just a simple standoff designed to improve routing of pi camera ribbon cable along the articulating arm, and reduce damage when attaching with zip ties.
UPDATE 10MAY23: Added a version for USB webcam cables, 3mm in diameter.
Articulating Arm:
https://www.printables.com/model/3407#_ga=2.152028857.1288658653.1650741378-196541523.1648762463
The author marked this model as their own original creation.