25" X 25" Steel Return Air Filter Grille for 1" Filter - Removable Frame - Black - [Outer Dimensions: 27 5/8" X 27 5/8"] w26h26 display = 'block'

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5" - SEE BELOW IN DESCRIPTION How To Measure A Grille

+ Product Description Upgrade your HVAC system with our 6" Round Air Vent Supply Grille

and scratch-resistant surface that enhances the aesthetics of any room

+ Product Details Size – 24"w X 36"h is the size for the duct opening measurement only

25" X 25" Steel Return Air Filter Grille for 1" Filter - Removable Frame - Black - [Outer Dimensions: 27 5/8" X 27 5/8"] w26h26 display = 'block'+ Product Details Size 25"w X 25"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 27 5 8" width X 27 5 8" height Actual Filter Size 24 3 4"w x 24 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.