8" x 24" or 24" x 8" Cube Core Eggcrate Return Air Grille 18in diameter The first number in a

The first number in a grille size represents the width

actual front end outer dimensions are approximately 25

Energy Efficient – Air-tight inner core decreases the pressure loss and provides a more hygienic environment - high energy efficient / No fiberglass erosion into air stream

High Quality – Solid stamped steel with counter-sunk screw holes (screws included) and no sharp edges

8" x 24" or 24" x 8" Cube Core Eggcrate Return Air Grille 18in diameter The first number in a+ Product Details Size 8" x 24" or 24" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" X 25. 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