Summary

This is a standoff buzzer mount to mount a buzzer or beeper on FlexRC Ascent 3 3-inch frame (https://flexrc.com/product/ascent-3-frame/). It's designed for a Banggood beeper with a 9mm diameter (Mine is actually 9.15mm). https://www.banggood.com/5-PCS-Super-Loud-5V-Active-Alarm-Buzzer-Beeper-Tracker-95_5mm-for-Racing-Drone-p-1117207.html.

Use flexible TPU filament.

Update: Added a version with a tighter fit and a rim to hold it in place better.