The elastic on my wrap-around pop filter kept working itself loose over time until the pop filter would fall off of my microphone. This simple parametric clip prevents that.
The provided STL fits my Audio-Technica AT2035 condenser microphone, which has a diameter of 46mm. If your mic is significantly different, or you need a different sized clip, then you can use the parameterized Fusion360 file to create a custom one.
The author hasn't provided the model origin yet.