24" X 20" Steel Return Air Filter Grille for 1" Filter - Removable Frame - Black - [Outer Dimensions: 26 5/8" X 22 5/8"] Return Grille + Product Description This aluminum

+ Product Description This aluminum flex duct is intended to be used in heating

and versatile for any project

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 12" duct opening (measured at the opening)

+ Product Details Size - 34"w X 28"h is the size for the duct opening measurement only

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

24" X 20" Steel Return Air Filter Grille for 1" Filter - Removable Frame - Black - [Outer Dimensions: 26 5/8" X 22 5/8"] Return Grille + Product Description This aluminum+ Product Details Size 24"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 26 5 8" width X 22 5 8" height Actual Filter Size 23 3 4"w x 19 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.