20" x 28" or 28" x 20" Cube Core Eggcrate Return Air Grille w12h12 + Product Details Heavy-Duty Steel

+ Product Details Heavy-Duty Steel Construction - Made from 20-gauge steel for superior durability and reliable performance

+ Product Details Size - 25"w X 30"h is the size for the duct opening measurement only

our grill boasts an impressive 96% airflow capacity

Crafted meticulously from high-quality steel

85" width X 21

20" x 28" or 28" x 20" Cube Core Eggcrate Return Air Grille w12h12 + Product Details Heavy-Duty Steel+ Product Details Size 20" x 28" or 28" x 20" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 75" X 29. 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