Springs to snap onto the Prusa I3 frame to dampen acoustic coupling to the table underneath. It simply hooks into the 30mm extrutions.
Print as many as needed, I use 8. 4 might be enough. Experiment.
Mine are printed in generic PETG, 20% infill. feels springy enough.
Designed by me in Fusion360 and released under WTFPL – Do What the Fuck You Want to Public License - http://www.wtfpl.net/
Ah yes, I removed the original rubber feet, tug them on the side of one og the extrusions, just to not loose them
The author hasn't provided the model origin yet.