8" x 26" or 26" x 8" Cube Core Eggcrate Return Air Grille w20h20 Actual Filter Size – 24

Actual Filter Size – 24 3/4"w x 35 3/4" x 1"

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+ Product Details Size – 12" x 16" or 16" x 12" is the size for the duct opening measurement only

Adjustable airflow control – Adjustable airflow control: The system allows users to customize the amount of air supply

Rigid Built For External Use– The sturdy and rigid design features noise free components that eliminates vibration and excess noise to the louvers

8" x 26" or 26" x 8" Cube Core Eggcrate Return Air Grille w20h20 Actual Filter Size – 24+ 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