40 mm fan guard
thingiverse
A simple grill, it's adapted for use in 40mm fan, Using as reference the previous design for 50mm fans. Source file in .f3d is included, feel free to copy and modify it
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With this file you will be able to print 40 mm fan guard 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 40 mm fan guard.