Print settings:
.2 layer hight, I'm sure it would work just fine with larger layers it is a pretty simple part.
PLA
25% infill or higher if you are getting any sagging with your attachments.
Supports needed
The author remixed this model.
Remixed a wire clip model that fits 2020 extrusion, which the ender 3 uses. The clip can then be connected to other attachments with a M4 screw and nut. I used it to add a camera mount original ment for a prusa mini to my ended 3.