This is a box for Noctua (but maybe also other vendor) 120mm fans.

The fan box can be used with 10cm (4inch) hose to send fumes out of the window.

The Noctua NF-F12 iPPC-3000 fits perfectly.

If you need to install the box to the wall, there is a mount kit with anti-vibration system (to be printed in TPU).

You need to cut anti-vibration pieces according to your needs.

You should buy nuts and bolts according to your setup. I used M4x40mm for the box and M6x45mm for wall support. 

Washers suggested everywhere.

For doubts and questions, please ask.