Compatible with RC speed tank by Bryant87 (https://www.thingiverse.com/thing:2024364)

This is a mount for leds on a round pcb with 3cm diameter. The led is recessed in the bumper to protect it from impacts and dirt. This part can be printed without support, if you print it standing like in the file.
I use this LED: https://hobbyking.com/de_de/rgb-led-circle-x6-12v-lighting-system.html
There is a hole in the upper part (see image) to pass the cable through.