Hi, 

As I had to space my shelf away from the wall, the original spacers that were provided with BROR did not fit as they are too small. 

Modelled them to fit into the free bold hole and add some window gasket between this sandwich like design in order to get rid of any resonances getting into an already loud shelf. 

It uses the original nut from BROR, but you have to get M5 20mm bolt to reach the nut from the front. 

Nut is coming dropped from the top into the retaining hole, so if you want to print it for both sides, please mirror the part in X xis. 

The thickness of the window gasket may wary, so you may need to adjust the bold length accordingly.

Space between the wall and shelf is exact 20mm for this design. If you want to extend or shorten that, please find STEP files to modify it to suit your needs.