12" X 34" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 14 5/8" X 36 5/8"] 18in diameter actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in

actual front end outer dimensions are approximately 13

Actual Filter Size – 25 3/4"w x 7 3/4" x 1"

actual front end outer dimensions are approximately 42 5/8" width X 12 5/8" height -

actual front end outer dimensions are approximately 20 5/8" width X 22 5/8" height

+ Product Details Size – 32"w X 20"h is the size for the duct opening measurement only

12" X 34" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 14 5 8" X 36 5 8"] 18in diameter actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in actual front end outer dimensions are approximately 13 Actual Filter Size – 25 3 4"w x 7 3 4" x 1"