8" x 10" or 10" x 8" Cube Core Eggcrate Return Air Grille Grilles The operable dampers

The operable dampers

+ Product Details Size – 34"w X 28"h is the size for the duct opening measurement only

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8" x 10" or 10" x 8" Cube Core Eggcrate Return Air Grille Grilles The operable dampers+ Product Details Size 8" x 10" or 10" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" X 11. 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