6" x 12" or 12" x 6" Cube Core Eggcrate Return Air Grille Color_White With precise measurements and easy

With precise measurements and easy installation

rated at R3

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

6" x 12" or 12" x 6" Cube Core Eggcrate Return Air Grille Color_White With precise measurements and easy+ Product Details Size 6" x 12" or 12" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 8. 5" X 14. 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