12" X 14" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 14 5/8" X 16 5/8"] Fixed Blades positioning supply and return grills Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

positioning supply and return grills accordingly

actual front end outer dimensions are approximately 26 5/8" width X 16 5/8" height

actual front end outer dimensions are approximately 27 5/8" width X 24 5/8" height

+ Product Details Size - 28"w X 6"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 20 5/8" width X 24 5/8" height

12" X 14" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 14 5 8" X 16 5 8"] Fixed Blades positioning supply and return grills Compatible With Duct 7in Applications This sheet metal DDAG A 1212 positioning supply and return grills accordingly actual front end outer dimensions are approximately 26 5 8" width X 16 5 8" height