18" X 25" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 20 5/8" X 27 5/8"] Grilles actual front end outer dimensions Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

actual front end outer dimensions are approximately 16 5/8" width X 10 5/8" height

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

actual front end outer dimensions are approximately 12 5/8" width X 28 5/8" height

actual front end outer dimensions are approximately 12 5/8" width X 12 5/8" height -

actual front end outer dimensions are approximately 32 5/8" width X 8 5/8" height

18" X 25" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 20 5 8" X 27 5 8"] Grilles actual front end outer dimensions Compatible With Duct 7in Applications This sheet metal DDAG A 1212 actual front end outer dimensions are approximately 16 5 8" width X 10 5 8" height + Product Details Size 22"w X 22"h is the size for the duct opening measurement only