This is designed to be paired with the Stratux Nano case for mounting your ADS-B receiver in a window. As printed, it allows for the USB GPS to be exposed for reception.
No supports required for printing. As with the case, recommend printing in PETG or ASA for temperature and UV resistance.
See here for Stratux Nano Case:
https://www.printables.com/model/282551-stratux-nano-remix
The author marked this model as their own original creation.