22" x 34" or 34" x 22" Cube Core Eggcrate Return Air Grille Material_Aluminum + Product Details Size -

+ Product Details Size - 30"w X 18"h is the size for the duct opening measurement only

+ Product Details Size – 20" x 32" or 32" x 20" is the size for the duct opening measurement only

+ Product Details Size - 10"w X 6"h is the size for the duct opening measurement only

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Ring Base Design – Allows for easy installation without removing the thermostat

22" x 34" or 34" x 22" Cube Core Eggcrate Return Air Grille Material_Aluminum + Product Details Size -+ 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