40mm to 60mm fan reduction
thingiverse
Opt for a 60mm fan instead of the 40mm one when installing the tunnel.
Download Model from thingiverse
With this file you will be able to print 40mm to 60mm fan reduction 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 40mm to 60mm fan reduction.