A simple cover with 4 holes for screwing to the back of the case. This plate blocks off airflow in a Phanteks Enthoo Primo case above the PCI expansion bays.

I whipped this up quick for a vertical flow system in my PC with sealed sides. I could not find a plate so I tossed one together in Fusion360.

I recommend pre-running a self tapping fan screw through first to get the holes to size, it will help on final fit.

Creality

CR-10

No

No

.2

.15

Pre-Tap screw holes with fan screw before install for easier assembly