This is a bracket to hang an 8mm (or equivalent) rod, spanning between pilaster strips.
I created this to hold some spare rods I had laying around to store my filament spools in a built-in in my office.
With their small size, I do not know how well these will print on an FDM printer. I printed mine in ABS Like resin on my Mars 3 4K
The author marked this model as their own original creation.