120mm to 90mm Fan Adapter
thingiverse
I only had 120mm fans and needed a 90mm for the A8 board case i liked. this was created in Tinkercad.
Download Model from thingiverse
With this file you will be able to print 120mm to 90mm 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 120mm to 90mm Fan Adapter.