10" X 30" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 12 5/8" X 32 5/8"] 18" Diameter } /* Added styles for

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+ Product Details Size – 10" X 4" is the size for the duct opening (floor/vent hole) measurement only

Measure the size of the vent opening

875" width X 9

10" X 30" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 12 5/8" X 32 5/8"] 18" Diameter } /* Added styles for+ Product Details Size 10"w X 30"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 12 5 8" width X 32 5 8" height High quality high quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Location sidewall and ceiling Design removable door face for easy filter change & cleaning uses a 1" thick filter. Our filter grille latch is easy to use on your fingers and