12" X 12" Steel Return Air Filter Grille for 1" Filter - Removable Frame - Black - [Outer Dimensions: 14 5/8" X 14 5/8"] RV Mobile Home 875" width X 15 4 X 12 Is CRFG2028 Width_14in

875" width X 15

+ Product Details Size - 20"w X 30"h is the size for the duct opening measurement only

+ Product Details Size - 6"w X 28"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 24 5/8" width X 31 5/8" height

actual front end outer dimensions are approximately 12 5/8" width X 32 5/8" height -

12" X 12" Steel Return Air Filter Grille for 1" Filter Removable Frame Black [Outer Dimensions: 14 5 8" X 14 5 8"] RV Mobile Home 875" width X 15 4 X 12 Is CRFG2028 Width_14in 875" width X 15 + Product Details Size 20"w X 30"h is the size for the duct opening measurement only