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

+ Product Spec Sheet Aluminum Return Filter Grille Spec Sheet

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

+ Product Details Size - 26"w X 18"h is the size for the duct opening measurement only

We carry sizes the big box stores don't

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

28" X 32" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 30 5/8" X 34 5/8"] w16h16 + Product Spec Sheet Aluminum+ 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.