This is a diffuser for Sofirn's Q8 Pro. By design, the fit is tight enough that the flashlight can be hung from the integrated lanyard loop attachment point.
I printed this in esun GITD PLA with 10% gyroid infill and fuzzy skin (outside only, 0.1 thickness). Use of this diffuser should be relegated to lower brightness settings unless materials with a higher temperature resistance are used.
The author hasn't provided the model origin yet.