36" X 20" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 38 5/8" X 22 5/8"] w24h24 + Product Details Size -

+ Product Details Size - 4"w X 34"h is the size for the duct opening measurement only

+ Product Details Size – 10" x 30" or 30" x 10" is the size for the duct opening measurement only

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+ Product Details Size – 24"w X 8"h is the size for the duct opening measurement only

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36" X 20" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 38 5/8" X 22 5/8"] w24h24 + Product Details Size -+ Product Details Size 36"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 38 5 8" width X 22 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