Aadjustable air inlet

I needed an air inlet for the Cabinet of my 3d Printer.

I reworked the hole in the middle so that an countersunk screw M4x8 took place in it.
I glued the screw to the washer "mutter".
It is designed for an 90mm inlet hole in a plate of 15mm thickness.

V2:
The legs of V1 broke due to hole Diameter inaccuracy.
I redesigned the Holding mechanism so that the thickness of the plate doesn`t matter.
I tightened the new ring "innenring" with SPAX 3,5x12 flat head screws into my 15mm thick plate. You would have to adjust that for the Thickness of your plate.

Feel free to ask me for Adjustments in Diameter/thickness.