20" x 26" or 26" x 20" Cube Core Eggcrate Return Air Grille Aluminum Bar [Outer Dimensions: 10

[Outer Dimensions: 10

+ Product Details Size - 6"w X 18"h is the size for the duct opening measurement only

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actual front end outer dimensions are approximately 20 5/8" width X 14 5/8" height -

Easy Installation – Comes with all necessary installation screws for a quick and hassle-free setup

20" x 26" or 26" x 20" Cube Core Eggcrate Return Air Grille Aluminum Bar [Outer Dimensions: 10+ Product Details Size 20" x 26 or 26" x 20" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 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