8" x 10" or 10" x 8" Cube Core Eggcrate Return Air Grille 1-Way 75"H – fits a 20"

75"H – fits a 20" X 4" duct opening

+ Product Details Size - 24"w X 16"h is the size for the duct opening measurement only

+ Product Details Size – 10"w X 4"h is the size for the duct opening measurement only

32"w X 8"h Is The Size For The Duct Opening Measurement Only

Design - special "V" shaped louvers ensure 100% view block while ensuring easy un-restricted air flow

8" x 10" or 10" x 8" Cube Core Eggcrate Return Air Grille 1-Way 75"H – fits a 20"+ Product Details Size 8" x 10" or 10" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" X 11. 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