pc case, 120MM to 140MM fan adapter
thingiverse
this adapter is for the pc case X-tech Environ Gmr-2 but maybe you can use to other cases. it do not require support to print. it increase the thickness of the fan by 16mm but it do not change the appearance of the case, it use the radiator screw to attach to the adapter and standar screws to attach to the case.
Download Model from thingiverse
With this file you will be able to print pc case, 120MM to 140MM 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 pc case, 120MM to 140MM fan adapter.