Cooling Fan Adapter
thingiverse
This adapter lets you install a 30mm cooling fan right where a 40mm one would normally go.
Download Model from thingiverse
With this file you will be able to print Cooling Fan Adapter with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Cooling Fan Adapter.