20" X 18" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 22 5/8" X 20 5/8"] Material_Steel + Product Details Size -

+ Product Details Size - 36"w X 34"h is the size for the duct opening measurement only

Easy Installation – Complete set of sponge gasket and mounting frame included

+ Product Details Size – 22"w X 24"h is the size for the duct opening measurement only

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[Outer Dimensions: 38

20" X 18" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 22 5/8" X 20 5/8"] Material_Steel + Product Details Size -+ Product Details Size 20"w X 18"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 22 5 8" width X 20 5 8" height High Quality high quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Installation Location Sidewall & ceiling Design removable frame for easy filter change & cleaning uses a 1" thick filter. Our filter grille latch is easy to use on your