Seller: nysalvage (3,763) 100%, Location: Oneonta, New York, Ships to: US & many other countries, Item: 191987624816 Nice vintage cast iron heat grate vent with louvers. Top of grate is square but it has a round opening. It is not marked, the manufacturer is unknown. Nice decorative pattern. Most original shiny black paint remains with some very slight scratching/chipping.The louvers do function as they should. Overall good condition. Please look over the pictures below and ask question when needed. Thanks for your interest. Measures approx: 8 5/8 x 8 5/8 Rough opening: 7" diameter Depth: 1 7/8"