Just as the title said, this is a simple diffuser cap for the Streamlight Sidewinder Compact flashlight.

Pretty lightweight and fits well with my flashlight (you may hear a click when you install the cap in place)

I also added a 1/4" tapping hole at the bottom of the cap (the threads need to be molded using a screw), which allows me to attach my flashlight to some tripods and can be used as a camping light

This cap has not been tested on Sidewinder Compact II