This is an 80mm fan cover that is designed to look like the Aperture Science logo from the video game Portal. I attached it with an m4 screw and nut as it was the same size as the fan hole. The screws do not tap into the holes, so you will need a nut, however you can even print a screw if you need to and if your printer is fine enough. I originally created it to cover my SV06 Plus fan when I upgraded it.