24" X 16" Steel Return Air Filter Grille for 1" Filter - Removable Frame - * Filter Included * [Outer Dimensions: 26 5/8" X 18 5/8"] 10" Diameter With a 4" diameter for

With a 4" diameter for the duct opening measurement

+ Product Details Size – 6" round duct opening-

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actual front end outer dimensions are approximately 32 5/8" width X 8 5/8" height -

24" X 16" Steel Return Air Filter Grille for 1" Filter - Removable Frame - * Filter Included * [Outer Dimensions: 26 5/8" X 18 5/8"] 10" Diameter With a 4" diameter for+ Product Details Size 24"w X 16"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 26 5 8" width X 18 5 8" height Actual Filter Size 23 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.