6" x 18" or 18" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 20.5"] Color_Red Oak + Product Details Perfect Fit Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Perfect Fit & Easy Sizing - Designed for a 32" x 32" duct opening (measured at the opening)

75" width X 21

actual front end outer dimensions are approximately 26 5/8" width X 20 5/8" height

this model ensures top-notch air quality

+ Product Details Size – 12"w X 26"h is the size for the duct opening measurement only

6" x 18" or 18" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Aluminum White [Outer Dimensions: 8.5" X 20.5"] Color_Red Oak + Product Details Perfect Fit Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Perfect Fit & Easy Sizing Designed for a 32" x 32" duct opening (measured at the opening) 75" width X 21