10" x 20" or 20" x 10" Cube Core Eggcrate Return Air Grille Floor Grille Every grille has a front

Every grille has a front end frame that will overlap at the wall joint

+ Product Details Size – 12" x 30" or 30" x 12" is the size for the duct opening measurement only

All of these grills have dampers

+ Product Details Size - 10"w X 8"h is the size for the duct opening measurement only

+ Product Details Size - 10"w X 30"h is the size for the duct opening measurement only

10" x 20" or 20" x 10" Cube Core Eggcrate Return Air Grille Floor Grille Every grille has a front+ Product Details Size 10" x 20" or 20" x 10" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 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