8" x 26" or 26" x 8" Cube Core Eggcrate Return Air Grille Fixed Blades while the powder-coat finish offers

while the powder-coat finish offers a sleek

+ Product Details Size – 16"w X 20"h is the size for the duct opening measurement only

Actual Filter Size – 21 3/4"w x 35 3/4" x 1"

+ Product Details Size – 26" x 30" or 30" x 26" is the size for the duct opening measurement only

+ Product Details Size – 12"w X 6"h is the size for the duct opening measurement only

8" x 26" or 26" x 8" Cube Core Eggcrate Return Air Grille Fixed Blades while the powder-coat finish offers+ Product Details Size 8" x 26" or 26" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" X 27. 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