This is a 1U rack mount for MikroTik CRS305-1G 4S+ IN.
This model has exactly twice the width of the original model, so it can be used in combination with the original model. (e.g. 1 MikroTik with 4 raspberry pi, 2 MikroTik with 2 raspberry pi, or 3 MikroTik)
Get ears from the original model in thingiverse.
The author remixed this model.
Adjust for CRS305-1G-4S+IN