40mm fan cover
thingiverse
The simple FAN cover keeps the warm air from being pulled by the heating bed's airflow. It fits snugly around a 40mm fan, and with some scaling adjustments in your slicer software, it will accommodate both larger and smaller fans.
Download Model from thingiverse
With this file you will be able to print 40mm fan cover 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 cover.