This is an “eye” insert for the Droid Division IG Assassin droid head. It pops in the upper holes and has an insert on the back for an LED.
I used LED's connected to a Raspberry Pi and needed a way for the LED to be more visible.
I printed these with natural color filament. If you print slower it will be more clear, faster printing will make it more white.
The author marked this model as their own original creation.