6" x 20" or 20" x 6" Cube Core Eggcrate Return Air Grille Aluminum Adjustable Curved Blade + Product Details Size –

+ Product Details Size – 3"w X 10"h or 10"w X 3"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 22" x 10" OR 10" x 22" duct opening (measured at the opening)

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 14" OR 14" X 16" duct opening (measured at the opening)

actual front end outer dimensions are 19" Width X 13" Height

75" Width X 11

6" x 20" or 20" x 6" Cube Core Eggcrate Return Air Grille Aluminum Adjustable Curved Blade + Product Details Size –+ Product Details Size 6" x 20" or 20" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 75" X 21. 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