This is a light former for the SmallRig RM75 LED pocket-light, that restricts the emitted light to be a little more focused.

The case sits perfectly snug and has a little ridge that snaps at the rear part of the light. There is no rattle. Furthermore, the bottom part of the light, where the mounting screw is, is cut out from the model, so it does support mounting the light on a tripod.

I printed the light former using black PETG, 0.2mm layer height and 20% infill.