Fidget Spinner Centerpiece
Please note, this is my older version, new thing can be found at Thing: 2228855.
I created this centerpiece to fit inside an 8X22X7 mm skateboard bearing, for use with a fidget spinner. It's two-piece, so the larger one fits underneath and through the bearing, while the smaller part fits on top like a cap.
The version 2 file contains a thinner bottom plate and a second cap with a flat top.