8" x 18" or 18" x 8" Cube Core Eggcrate Return Air Grille Black Designed for a 1" thick

Designed for a 1" thick filter

+ Product Details Size – 32"w X 22"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 12 5/8" width X 20 5/8" height

ensuring it arrives at your home in perfect condition

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8" x 18" or 18" x 8" Cube Core Eggcrate Return Air Grille Black Designed for a 1" thick+ Product Details Size 8" x 18" or 18" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" X 19. 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