34" X 12" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 36 5/8" X 14 5/8"] w24h24 actual front end outer dimensions

actual front end outer dimensions are approximately 10 5/8" width X 10 5/8" height

Actual Filter Size – 23 3/4"w x 21 3/4" x 1"

How To Measure A Grille

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

34" X 12" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 36 5/8" X 14 5/8"] w24h24 actual front end outer dimensions+ Product Details Size 34"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 36 5 8" width X 14 5 8" height Actual Filter Size 33 3 4"w x 11 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.