6" x 28" or 28" x 6" Cube Core Eggcrate Return Air Grille 14in diameter 75" Width X 31

75" Width X 31

+ Product Details Size - 18"w X 18"h X 2"d (for duct opening measurement only)

Incorporated with Integral Butterfly Damper for full Airflow Control

actual front end outer dimensions are approximately 2" wider

Universal size

6" x 28" or 28" x 6" Cube Core Eggcrate Return Air Grille 14in diameter 75" Width X 31+ Product Details Size 6" x 28" or 28" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 75" X 29. 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