20" X 16" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 22 5/8" X 18 5/8"] w18h18 75" width X 11

75" width X 11

actual front end outer dimensions are approximately 20 5/8" width X 38 5/8" height -

actual front end outer dimensions are approximately 16 5/8" width X 28 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)

actual front end outer dimensions are approximately 35

20" X 16" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 22 5/8" X 18 5/8"] w18h18 75" width X 11+ Product Details Size 20"w X 16"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 22 5 8" width X 18 5 8" height Actual Filter Size 19 3 4"w x 15 3 4" x 1" High Quality High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Installation Location Sidewall and ceiling Design Removable door face for easy filter change & cleaning uses a 1" thick filter.