This holds the headlight bulb in place on a Pontiac Fiero 1984-1988. It replaces the easily breakable stock one. I used aftermarket LEDs, but any standard size halogens will fit too.
I used PETG because it's relatively weather and UV resistant.
May also fit for other cars that use 5 x 7 headlights, just check the distance between the mounting holes first. The bottom two should be about 107mm while the top should be about 87mm apart.