Review on 2-Pack Black Stainless Steel Magnetic Door Stop Catch Holder, Floor Mount Door Stopper with Strong Magnet for Securely Propping Open Doors, Ideal for Gaps Between 0.2-0.5 Inches by Kim Jones

among all similar products I chose this one with a more subtle finish color - black matte, it turned out to be a smooth matte and glossy pinball machine with fine engraving CODACE This product is for a gap between the bottom of the door and the bottom 5-12mm, I have 21mm. But I like the engraving on the pinball machine. So I found a simple solution by cutting out thin cardboard to the right size and pressing it flat (about 1-2mm). And the flipper is easy to attach and detach. See pictures for details.