10" x 36" or 36" x 10" Cube Core Eggcrate Return Air Grille w22h22 Each grille is securely shrink-wrapped

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

this solid-base guard ensures long-lasting performance with minimal hassle

actual front end outer dimensions are approximately 30 5/8" width X 18 5/8" height

actual front end outer dimensions are approximately 34 5/8" width X 14 5/8" height

With a 4" diameter for the duct opening measurement

10" x 36" or 36" x 10" Cube Core Eggcrate Return Air Grille w22h22 Each grille is securely shrink-wrapped+ Product Details Size 10" x 36" or 36" x 10" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 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