This is a replacement top grill for the Fractal Design Node 202. This mod allows you to mount 3 Noctua NF-A4x20 (or any 40mm) fans onto the top grill to help exhaust hot air from the motherboard area.
I have no idea yet how it affect thermals as I'm waiting on most of my parts to show up, but decided to so this since I've heard that the node can have some thermals issues due to its size.
To do this mod, you need to carefully unbend the original grills metal retention clips and slide it all out. Afterwards, place the printed grill into the case (it will only fit one way) and either glue the tabs or melt them down with a soldering iron to make the printed grill stay in place. Always apply a gently pressure to it while either gluing or melting the tabs, to make sure that the printed grill stays flush with the case.
STEP of the model is also included in case you want to make any adjustments to it.