Distance filler block for electric door magnet

So my partner once had a ticket to mount a magnetic door stopper, but the doors were not opening far enough, or there was something on the way which customer didn't wanted to damage. He asked me to design this simple filler block which would look nice also and allow 5mm diameter long screws to go through it to mount it to the wall and hold the magnet as well. This is it :)I've rounded the edges as well so it's not hurt hands during mounting and also looks nicer.