6" x 16" or 16" x 6" Cube Core Eggcrate Return Air Grille Powder-Coat preventDefault()

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+ Product Details Size - 10"w X 20"h is the size for the duct opening measurement only

actual front end outer dimensions are 13

6" x 16" or 16" x 6" Cube Core Eggcrate Return Air Grille Powder-Coat preventDefault()+ Product Details Size 6" x 16" or 16" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 8. 5" X 18. 5". 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