This is a string muter, allowing a “Palm-mute” like sound without the need to keep the palm on the strings!
I printed it using Flex Material - TPU 95 on a Prusa MK4S and it worked flawlessly.
Recommended Print settings -
0.15 Structural
60% Infill
2 Perimeters (walls)
6 Bottom
5 Top
Used a Biqu “Cryogrip Glacier” Bed for awesome adhesion
The author remixed this model.
A completely new model, for different purpose, used the original only for the initial reference