This mount is designed to work with Reelsteady GO, a video stabilisation software for GoPro. The mount filters high frequency vibrations, since the software can not handle them.
The results without the use of the software are worse than with a standard mount.
The base is printed with a strong plastic, like PETG.
The case is printed in TPU.
Cable ties are placed inside the groves of the base plate and are inserted in the dedicated holes in the TPU case. The cable ties can be glued in place but I had bad luck with super glue since the cable ties turned brittle. For me, the cable ties hold well enough with only the friction inside the parts.
Demo video where I used this mount: https://youtu.be/zQs-lE85fZk