26" X 10" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 28 5/8" X 12 5/8"] Return Grille actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in

actual front end outer dimensions are approximately 20 5/8" width X 338 5/8" height

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

Actual Filter Size – 23 3/4"w x 19 3/4" x 1"

+ Product Details Size - 28"w X 36"h is the size for the duct opening measurement only

+ Product Details Size - 32"w X 28"h is the size for the duct opening measurement only

26" X 10" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 28 5 8" X 12 5 8"] Return Grille actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in actual front end outer dimensions are approximately 20 5 8" width X 338 5 8" height + Product Details Size – 6"w X 6"h is the size for the duct opening measurement only