Discussion What is this thing from my zaber sentry 2.0?

[Curvas]

I opened the case and took out everything to do some cleaning, and this things just dropped from the case.

Does anyone know what this is?

 

[1337harcha]

Could it be a support/spacer for the PCIe extension at GPU end? The extension screws into the case/bracket, but it probably has this thing sandwitched.