Hamilton Sinkler
(212) 760-337731 East 32nd Street, 11th Floor New York, NY 10016https://www.hamiltonsinkler.com/ Makers of sand-cast, rock-solid bronze heat registers and grilles. Pieces are finished with a patina which further enhances the beauty of bronze. No maintenance is required, since bronze is a living finish and will continue to oxidize gracefully over time.