This is a 17mm or 9/32in. bumper plug for your vehicle.
For best results use touch-up paint that matches your car's paint code and try to use a filament that is also similar.
No supports needed, higher infill recommended to bolster the clips.
I have had one made of PLA on my car since April 2021 and it has survived full four-season weather and tens of thousands of miles.
The author hasn't provided the model origin yet.