12" x 14" or 14" x 12" Cube Core Eggcrate Return Air Grille 14" Diameter Ideal for Walls & Ceilings:

Ideal for Walls & Ceilings: Designed for seamless installation in standard 10" X 8" duct openings

+ Product Details Size - 24"w X 26"h is the size for the duct opening measurement only

+ Product Details Size – 18" x 28" or 28" x 18" is the size for the duct opening measurement only

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12" x 14" or 14" x 12" Cube Core Eggcrate Return Air Grille 14" Diameter Ideal for Walls & Ceilings:+ Product Details Size 12" x 14" or 14" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" X 15. 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