A replacement for the K&M (König & Meyer) mic stand (118/4 orchestra music stand art-no. 11847-000-02) clamping element (art-no. 6-86642-1-55) that is way too easily lost when the mic stand pole is removed.

https://www.k-m.de/media/pdf/50/4f/ba/11841-000-02_en.pdf

Print strong enough (~5 walls + grid infill pattern) to make it last forever.