8" X 18" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 10 5/8" X 20 5/8"] Aluminum - Cube Core With a 5" diameter for

With a 5" diameter for the duct opening measurement

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+ Product Details Perfect Fit & Easy Sizing - Designed for a 24" x 24" duct opening (measured at the opening)

actual front end outer dimensions are approximately 24 5/8" width X 18 5/8" height

+ Product Details Size – 24"w X 14"h is the size for the duct opening measurement only

8" X 18" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 10 5/8" X 20 5/8"] Aluminum - Cube Core With a 5" diameter for+ Product Details Size 8"w X 18"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 10 5 8" width X 20 5 8" height Actual Filter Size 7 3 4"w x 17 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. Our