14" x 16" or 16" x 14" Cube Core Eggcrate Return Air Grille 2-Way See chart below:

See chart below:

Adjustable airflow control - by rotating the middle disk

actual front end outer dimensions are approximately 23

Actual Filter Size – 25 3/4"w x 19 3/4" x 1"

14" x 16" or 16" x 14" Cube Core Eggcrate Return Air Grille 2-Way See chart below:+ Product Details Size 14" x 16" or 16" x 14" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 15. 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