12" x 14" or 14" x 12" Cube Core Eggcrate Return Air Grille 10" Diameter actual front end outer dimensions

actual front end outer dimensions are approximately 20 5/8" width X 16 5/8" height

Secure Locking Mechanism – Features a permanently attached eight-tumbler lock with a supplied key for added security

Actual Filter Size – 21 3/4"w x 29 3/4" x 1"

actual front end outer dimensions are 19

+ Product Details Size - 26"w X 36"h is the size for the duct opening measurement only

12" x 14" or 14" x 12" Cube Core Eggcrate Return Air Grille 10" 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