34" x 26" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return filter + Product Details Perfect Fit Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Perfect Fit & Easy Sizing - Designed for a 36" x 28" OR 28" x 36" duct opening (measured at the opening)

actual front end outer dimensions are approximately 28 5/8" width X 26 5/8" height

+ Product Details Size – 8" x 20" or 20" x 8" is the size for the duct opening measurement only

+ Product Details Size – 24"w X 14"h is the size for the duct opening measurement only

this diffuser is the perfect blend of function and style for your home

34" x 26" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return filter + Product Details Perfect Fit Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Perfect Fit & Easy Sizing Designed for a 36" x 28" OR 28" x 36" duct opening (measured at the opening) actual front end outer dimensions are approximately 28 5 8" width X 26 5 8" height