40mm Fan Duct
thingiverse
Here are some 40mm Fan-Ducts in different lenghts. I will add some more later.
Download Model from thingiverse
With this file you will be able to print 40mm Fan Duct 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 Fan Duct.