They are powder coated copper. I was going to build boxes and finish them in piano black. Moving to a smaller place now, so downsizing. Local pickup in Minneapolis / St Paul area. Photos files are too large to post
These were removed from a house I bought a couple years ago when they remodeled the family room. All appear to work. Pics won’t load, but it’s (3) R-3650C and (2) R-3650W