30mm to 40mm fan adapter.
thingiverse
Just 30to40 mm fan adapter if you don't have one of them. FreeCAD project included.
Download Model from thingiverse
With this file you will be able to print 30mm to 40mm fan adapter. 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 30mm to 40mm fan adapter..