18" x 32" or 32" x 18" Cube Core Eggcrate Return Air Grille RG66 Black-HP 6"w X 6"h 3-Way Fixed

6"w X 6"h 3-Way Fixed Curved Blade Air Supply Diffuser - Vent Duct Cover - Grille Register - Sidewall or Cieling - High Airflow - White

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Actual Filter Size – 23 3/4"w x 11 3/4" x 1"

+ Product Details Size – 14"w X 34"h is the size for the duct opening measurement only

with actual outer dimensions of 20

18" x 32" or 32" x 18" Cube Core Eggcrate Return Air Grille RG66 Black-HP 6"w X 6"h 3-Way Fixed+ Product Details Size 18" x 32" or 32" x 18" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 75" X 33. 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