26" X 26" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 28 5/8" X 28 5/8"] w12h12 + Product Details Size –

+ Product Details Size – 18"w X 36"h is the size for the duct opening measurement only

+ Product Details Size - 32"w X 30"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 18 5/8" width X 22 5/8" height

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actual front end outer dimensions are approximately 26 5/8" width X 32 5/8" height

26" X 26" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 28 5/8" X 28 5/8"] w12h12 + Product Details Size –+ Product Details Size 26"w X 26"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 28 5 8" width X 28 5 8" height Actual Filter Size 25 3 4"w x 25 3 4" x 1" High quality High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Design Removable door face for easy filter change & cleaning uses a 1" thick filter. Our filter grille latch is easy to use on