8" x 20" or 20" x 8" Cube Core Eggcrate Return Air Grille Fixed Blades with Damper See chart below:

See chart below:

actual front end outer dimensions are approximately 31

strong aluminum construction with smooth finished edges for easy and safe use

75" width X 7

+ Product Details Size - 30"w X 4"h is the size for the duct opening measurement only

8" x 20" or 20" x 8" Cube Core Eggcrate Return Air Grille Fixed Blades with Damper See chart below:+ Product Details Size 8" x 20" or 20" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" X 21. 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