18" X 30" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 20 5/8" X 32 5/8"] Grilles actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in

actual front end outer dimensions are approximately 14 5/8" width X 38 5/8" height -

Actual Filter Size – 23 3/4"w x 17 3/4" x 1"

actual front end outer dimensions are approximately 16 5/8" width X 20 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 30" OR 30" x 20" duct opening (measured at the opening)

+ Product Details Size - 14"w X 12"h is the size for the duct opening measurement only

18" X 30" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 20 5 8" X 32 5 8"] Grilles actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in actual front end outer dimensions are approximately 14 5 8" width X 38 5 8" height Actual Filter Size – 23 3 4"w x 17 3 4" x 1"