22" x 34" or 34" x 22" Cube Core Eggcrate Return Air Grille Material_Steel Actual Filter Size – 31

Actual Filter Size – 31 3/4"w x 21 3/4" x 1"

85" width X 21

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Ideal for Walls & Ceilings: Designed for seamless installation in standard 16" X 16" duct openings

22" x 34" or 34" x 22" Cube Core Eggcrate Return Air Grille Material_Steel Actual Filter Size – 31+ Product Details Size 22" x 34" or 34" x 22" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 23. 75" X 35. 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