14" x 36" or 36" x 14" Cube Core Eggcrate Return Air Grille w20h20 Each grille is securely shrink-wrapped

Each grille is securely shrink-wrapped with a cardboard backing to prevent damage during shipment

Actual Filter Size – 11 3/4"w x 31 3/4" x 1"

+ Product Details Size - 36"w X 24"h is the size for the duct opening measurement only

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

14" x 36" or 36" x 14" Cube Core Eggcrate Return Air Grille w20h20 Each grille is securely shrink-wrapped+ Product Details Size 14" x 36" or 36" x 14" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 15. 75" X 37. 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