12" x 16" or 16" x 12" Cube Core Eggcrate Return Air Grille 14in diameter 75"H – fits a 10"

75"H – fits a 10" X 10" duct opening

actual front end outer dimensions are approximately 26 5/8" width X 12 5/8" height

actual front end outer dimensions are approximately 24 5/8" width X 16 5/8" height

and squirrels

75" width X 19

12" x 16" or 16" x 12" Cube Core Eggcrate Return Air Grille 14in diameter 75"H – fits a 10"+ Product Details Size 12" x 16" or 16" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" X 17. 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