14" x 18" or 18" x 14" Cube Core Eggcrate Return Air Grille Compatible with Duct 6" + Product Details Size –

+ Product Details Size – 8"w X 24"h is the size for the duct opening measurement only

actual front end outer dimensions are 11

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Actual Front End Outer Dimensions Are 14" Width X 5" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

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

14" x 18" or 18" x 14" Cube Core Eggcrate Return Air Grille Compatible with Duct 6" + Product Details Size –+ Product Details Size 14" x 18" or 18" x 14" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 15. 75" X 19. 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