12" X 25" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 14 5/8" X 27 5/8"] w4h4 + Product Details Size -

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

+ Product Details Size – 34"w X 10"h is the size for the duct opening measurement only

+ Product Details Size & Compatibility – The 4" galvanized steel round side take-off is compatible with duct 4"

Actual Filter Size – 9 3/4"w x 25 3/4" x 1"

+ Product Details Size - 32"w X 10"h is the size for the duct opening measurement only

12" X 25" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 14 5/8" X 27 5/8"] w4h4 + Product Details Size -+ Product Details Size 12"w X 24"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 14 5 8" width X 26 5 8" height Actual Filter Size 11 3 4"w x 23 3 4" x 1" High quality High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Location Sidewall and ceiling Design Removable door face for easy filter change & cleaning uses a 1" thick filter. Our filter