I'm currently using a 3M Peltor Sporttac for my workplace. These are available with softgel pads, which are nice for comfort, but lose contour overtime and degrade in quality of filtering loud sounds. Therefore i printed those “Space and Contourholder”.
Printdetails:
2 of the same parts need to be printed. I printed them at 0.2 layerheight. At the height of 4.7mm there is a place for a neodymmagnet to keep the 2 parts together. Furthermore there is a hole for a M4 screw and screwhead to keep them alligned.
Additional parts: (Not needed for functionality)
1 x Round magnet Ø8mm x 3.5mm(Max)
2 x Screw M4 x 8mm(Max) (Screwhead max Ø 8mm, height max 4.5mm
If needed, i can modify the parts to fit the screws / magnets you're having laying arround.
The author hasn't provided the model origin yet.