14" x 26" or 26" x 14" Cube Core Eggcrate Return Air Grille Compatible With Duct 10in + Product Details Size –

+ Product Details Size – 14"w X 14"h is the size for the duct opening measurement only

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+ Product Details Size – 8"w X 4"h is the size for the duct opening measurement only

+ Product Details Size – 20" x 30" or 30" x 20" is the size for the duct opening measurement only

14" x 26" or 26" x 14" Cube Core Eggcrate Return Air Grille Compatible With Duct 10in + Product Details Size –+ Product Details Size 14" x 26" or 26" x 14" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 15. 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