This is a Microphone Flag, yes I also didn't knew it had a name, but is just the thing that goes in the Microphone to display an image, in this case the idea is to use it with a printed sticker so it can be reused.

It was designed for a Hyperx Solocast Microphone, but I guess it should be able to be used with any microphone that can use a 5/8 inches stand. The mic arm that I have uses a 3/8 screw, and the Holocast have threads for both.

There are 2 flag versions, one with a hole for a cable and one without, the flag size is 66mm x 66mm. Both flags have space to move the them closer or further away from the mic, but is just 6mm.

I used Bambu basic black PLA for the prints, and I recommend to use the 0.2mm nozzle for the threaded fastener or print it with an small layer height. I didn't try to print the fastener with the usual 0.4mm, I just use the 0.2mm one each time I print a thread. I printed with 25%-30% infill just to give it some strenght but it doesn't require a lot of material.

Te flags require some minimal support, I also added brim in the print profile, and both are removed very easily.

I uncluded the Fusion 360 file, in case you wanted to do any modification like changing the size of the flag, if you don't know how, let me know, and I can help. The fusion 360 project, has a mockup of the mic, is not entirely accurate, but good enough, it also has a mock of a 90 degrees angle, that I use to hide the usb c cable, so it doesn't get in the way of the flag logo.