16" x 26" or 26" x 16" Cube Core Eggcrate Return Air Grille Fixed Blades 16"w X 3"h Is The

16"w X 3"h Is The Size For The Duct Opening Measurement Only

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+ Product Details Size – 12" x 20" or 20" x 12" is the size for the duct opening measurement only

Actual Filter Size – 23 3/4"w x 29 3/4" x 1"

16" x 26" or 26" x 16" Cube Core Eggcrate Return Air Grille Fixed Blades 16"w X 3"h Is The+ Product Details Size 16" x 26" or 26" x 16" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 75" X 27. 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