This bracket can be used to mount a 20mm slim radiator in the top of a CoolerMaster NR200P case, as part of a custom watercooling loop. (I used an XSPC TX240.) I used the fans above radiator configuration, but I have also made one with fans below (although that second one is untested).

I had this part fabricated from sheet steel using Fractory. The STEP files contain the sheet metal bending operations.

More details on how I used this bracket here: https://imgur.com/gallery/wcu5cXt

The top plastic panel of the case needs to be modified to create space for the fans by cutting away some of the plastic grille. The metal mesh on top is unaffected, and unlike top hat solutions, the external dimensions of the case are unchanged.

I preferred this solution to mounting directly to the top plastic panel, as using this bracket, the top panel can be easily removed for cleaning, which is not possible without draining the loop if the radiators were mounted on the panel instead.