25" X 32" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 27 5/8" X 34 5/8"] Black then you'll need a 14-inch

then you'll need a 14-inch round vent

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Adjustable airflow control - by rotating the middle disk

+ Product Details Size - 34"w X 14"h is the size for the duct opening measurement only

+ Product Details Size - 18"w X 32"h is the size for the duct opening measurement only

25" X 32" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 27 5/8" X 34 5/8"] Black then you'll need a 14-inch+ Product Details Size 25"w X 32"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 27 5 8" width X 34 5 8" height. High Quality high quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Installation Location Ceiling Design Fixed hinged for easy filter change & cleaning uses a 1" thick filter. Our filter grille latch is easy to use on your fingers and