Seller: nysalvage (4,223) 100%, Location: Oneonta, New York, Ships to: US & many other countries, Item: 191946628755 Material: Cast Iron, Details: Very nice large antique cast iron cold air return with a decorative pattern. It is not marked the manufacturer is unknown. It has some crusty old black paint with it's original rust patina. No damage. These large grates are becoming harder to find. Overall good condition. Please look over the pictures and ask questions when needed. Thanks for looking. Measures approx: 23 1/4" X 31 1/8" overall, Would need a rough opening of 20" X 28"