This is great to fill with resin to create your own unique style. Brass base plated in a chocolate ox patina finish. Top hole for hanging. These are really nice....domed up gilding weight heavy brass, flat and filled in on the back. You might ask, though....how do I fill an open-backed bezel with resin? You have to put tape on the back.....sometimes duct tape works really well, or just wide clear shipping tape. Tape the back, then pour, let it set up and cure, then peel off....voila! Do your clean up and you're good to go. Some like the sand the resin to the back for a real cool aged Steampunk look. Ya gotta try it! 19x10mm.