28" X 6" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 30 5/8" X 8 5/8"] w10h10 + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size – 14"w X 10"h is the size for the duct opening measurement only

+ Product Details Size - 22"w X 32"h is the size for the duct opening measurement only

+ Product Details Size - 22"w X 36"h is the size for the duct opening measurement only

+ Product Details Size – 8"w X 26"h is the size for the duct opening measurement only

Actual Filter Size – 29 3/4"w x 23 3/4" x 1"

28" X 6" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 30 5 8" X 8 5 8"] w10h10 + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size – 14"w X 10"h is the size for the duct opening measurement only + Product Details Size 22"w X 32"h is the size for the duct opening measurement only