20" x 32" or 32" x 20" Cube Core Eggcrate Return Air Grille 6in diameter + Product Details Size -

+ Product Details Size - 12"w X 24"h is the size for the duct opening measurement only

Actual Filter Size – 7 3/4"w x 35 3/4" x 1"

75"H – fits a 18" X 4" duct opening

Actual Filter Size – 17 3/4"w x 31 3/4" x 1"

actual front end outer dimensions are approximately 16 5/8" width X 22 5/8" height

20" x 32" or 32" x 20" Cube Core Eggcrate Return Air Grille 6in diameter + Product Details Size -+ Product Details Size 20" x 32" or 32" x 20" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 75" X 33. 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