12" x 16" or 16" x 12" Cube Core Eggcrate Return Air Grille 14in diameter 75" width X 19

75" width X 19

and squirrels

+ Product Details Size - 12"w X 24"h X 2"d (for duct opening measurement only)

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

12" x 16" or 16" x 12" Cube Core Eggcrate Return Air Grille 14in diameter 75" width X 19+ 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