6" x 6" Cube Core Eggcrate Return Air Grille Fixed Blades with Damper actual front end outer dimensions

actual front end outer dimensions are approximately 37

and the second number represents the height

875" width X 25

+ Product Details Size - 20"w X 20"h is the size for the duct opening measurement only

6" x 6" Cube Core Eggcrate Return Air Grille Fixed Blades with Damper actual front end outer dimensions+ Product Details Size 6" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 75" X 7. 75". High Quality High quality, rust free aluminum construction with smooth finished edges and counter sunk screw holes (screws included); no sharp edges. Installation Location sidewall and ceiling. Design Cubic core eggcrate design Offers highest airflow efficiency at almost 95%, reducing electric bills and