Resized version of Noctua's Airflow Amplifier to fit 60mm fans mainly designed for Fractal Ridge case.
If you are ridge owner you can get second model that will go nicely with this one: https://www.printables.com/model/928672-front-60-mm-fan-mount-for-fractal-ridge-standoff-f
The author remixed this model.
Resized the original model to fit 60mm fan with correct screw hole placement (at least I hope)