18" X 34" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 20 5/8" X 36 5/8"] Aluminum Bar querySelectorAll('

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Actual Filter Size – 15 3/4"w x 15 3/4" x 1"

If your duct opening is 14 inches in diameter

Crafted from high-quality red oak wood

Filter grille features a user-friendly plastic latch that requires no screwdriver for opening

18" X 34" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 20 5/8" X 36 5/8"] Aluminum Bar querySelectorAll('+ Product Details Size 18"w X 34"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 20 5 8" width X 36 5 8" height Actual Filter Size 17 3 4"w x 33 3 4" x 1" High Quality High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Installation Location Sidewall and ceiling Design Removable door face for easy filter change & cleaning uses a 1" thick filter.