20" x 24" or 24" x 20" Cube Core Eggcrate Return Air Grille Compatible With Duct 6in our grill boasts an impressive

our grill boasts an impressive 96% airflow capacity

+ Product Details Size - 30"w X 2"h is the size for the duct opening measurement only

One model suits both T-Bar and Drywall installations

+ Product Details Size - 28"w X 32"h is the size for the duct opening measurement only

20" x 24" or 24" x 20" Cube Core Eggcrate Return Air Grille Compatible With Duct 6in our grill boasts an impressive+ Product Details Size 20" x 24" or 24" x 20" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 75" X 25. 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