This slide nut (or t-nut) fits perfectly into the Prusa MK3/MK3s extrusion profiles (Or any standard 3030 profile).
It allows you to add attachments to your extrusions and is cheaper than an aluminium nut.
Requirements:
For best mechanical results, use PET-G or ABS.
I recommend honeycomb or gyroid infill at or above 30%.
(Use 100% infill for best stability)
The author hasn't provided the model origin yet.