12" x 14" or 14" x 12" Cube Core Eggcrate Return Air Grille 14" Diameter actual front end outer dimensions

actual front end outer dimensions are approximately 30 5/8" width X 10 5/8" height

Actual Filter Size – 11 3/4"w x 23 3/4" x 1"

+ Product Details Size – 18" x 28" or 28" x 18" is the size for the duct opening measurement only

Do not measure the overall size of the register itself

12" x 14" or 14" x 12" Cube Core Eggcrate Return Air Grille 14" Diameter actual front end outer dimensions+ Product Details Size 12" x 14" or 14" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" X 15. 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