6" x 6" Cube Core Eggcrate Return Air Grille Color_Aluminum Measure the size of the

Measure the size of the air duct/drywall opening

+ Product Details Size - 30"w X 12"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 37

European: EN 10270-1-SM

6" x 6" Cube Core Eggcrate Return Air Grille Color_Aluminum Measure the size of the+ 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