This is standard "domed" wheel center cap for a Mitsubishi Starion / Chrysler Conquest. it's put together quick and it should fit fine. currently will make revision as time passes.
I made the print and it fitted well into the wheel. drove around town with speeds up to 65mph and freeway speed up to 100 mph with times ranging from 15 mins to 2 hours of drving time. and the cap is still there. so it's holding up well.
i used Hatchbox PLA and so fa so good.
Used PLA for fitment. Highly recommend PTEG / /ABS or better
6 days with it on my car and it's still in good shape, so i don't foresee any problems using PLA