A protective shell for an A2WS windscreen on a Shure SM57 microphone (just like the US president has used since 1965!). It prevents the windscreen from being crushed and deformed in storage or transport. The groove in the handle part is intended for a 25mm o-ring or rubber band to keep the shell closed.

I printed them hollow side down with supports and a 0.1 mm layer height. The opening for the microphone handle is generous to allow for some sag at the top when printed this way. If you print in a different orientation, you may want to line it with something like gaffer tape if the fit is too loose for your taste.

I developed mine before seeing: https://www.printables.com/model/1114884-case-for-sm57-with-official-pop-filterwindscreen-a
Consider @aarmea_2679826's model for something beefier that doesn't require supports.