40mm fan duct
thingiverse
The airflow on my 3drag/k8200 is supposed to correspond directly with fan speed, making it an efficient device. Additionally, I've provided the CAD file for those interested in making custom adjustments.
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.