6" x 6" Cube Core Eggcrate Return Air Grille Filter Grille only measure the "hole" in

only measure the "hole" in the wall/duct

+ Product Details Size - 6"w X 6"h is the size for the duct opening measurement only

75" width X 21

they seamlessly integrate into your space

these grilles ensure easy

6" x 6" Cube Core Eggcrate Return Air Grille Filter Grille only measure the "hole" in+ 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