28" X 8" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 30 5/8" X 10 5/8"] Powder Coated + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size – 34"w X 32"h is the size for the duct opening measurement only

+ Product Details Size - 25"w X 28"h is the size for the duct opening measurement only

Actual Filter Size – 31 3/4"w x 29 3/4" x 1"

+ Product Details Size – 10" x 14" or 14" x 10" is the size for the duct opening measurement only

Actual Filter Size – 25 3/4"w x 35 3/4" x 1"

28" X 8" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 30 5 8" X 10 5 8"] Powder Coated + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size – 34"w X 32"h is the size for the duct opening measurement only + Product Details Size 25"w X 28"h is the size for the duct opening measurement only