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 Actual Filter Size – 29

Actual Filter Size – 29 3/4"w x 29 3/4" x 1"

9% Pure Copper meeting ASTM B280 standards

thanks to counter-sunk screw holes and included screws

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

Great emphasis has been invested in the design of this product to prevent it from kinking in sharp bends & turns and to hold steady and at full diameter in all applications

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 Actual Filter Size – 29+ 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.