34" x 36" or 36" x 34" Cube Core Eggcrate Return Air Grille RG66 Black-HP 875" width X 10" height

875" width X 10" height

both individually adjustable

no exceptions

+ Product Details Size – 10"w X 22"h is the size for the duct opening measurement only

To Maximize Ventilation Results

34" x 36" or 36" x 34" Cube Core Eggcrate Return Air Grille RG66 Black-HP 875" width X 10" height+ Product Details Size 34" x 36" or 36" x 34" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 35. 75" X 37. 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