20" X 50" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 22 5/8" X 52 5/8"] w20h20 [Outer Dimensions: 10 Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

[Outer Dimensions: 10

+ Product Details Size - The listed 6" diameter refers specifically to the size of the duct opening

+ Product Details Size - 14"w X 8"h is the size for the duct opening measurement only

+ Product Details Size – 30"w X 22"h is the size for the duct opening measurement only

+ Product Details Size - 25"w X 26"h is the size for the duct opening measurement only

20" X 50" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 22 5 8" X 52 5 8"] w20h20 [Outer Dimensions: 10 Compatible With Duct 7in Applications This sheet metal DDAG A 1212 [Outer Dimensions: 10 + Product Details Size The listed 6" diameter refers specifically to the size of the duct opening