28" X 32" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 30 5/8" X 34 5/8"] w16h16 + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 18" duct opening (measured at the opening)

Actual Filter Size – 7 3/4"w x 27 3/4" x 1"

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+ Product Spec Sheet Aluminum Return Filter Grille Spec Sheet

We carry sizes the big box stores don't

28" X 32" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 30 5/8" X 34 5/8"] w16h16 + Product Details Perfect Fit+ Product Details Size 28"w X 32"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 30 5 8" width X 34 5 8" height Actual Filter Size 27 3 4"w x 31 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.