This is a Remix of the calibration snowflake. I added chamfers to the top and bottom surface to exclude the bottom and top layers from measurement (elephant foot etc.).
Furthermore I added some letters on the top surface for orientation.
[F]ront
[B]ack
[L]eft
[R]ight
The author remixed this model.
chamfers on top and bottom layers
some radii on the edges
orientation marks