8" x 28" or 28" x 8" Cube Core Eggcrate Return Air Grille 14in diameter actual front end outer dimensions

actual front end outer dimensions are approximately 30 5/8" width X 12 5/8" height

Adjustable airflow control - by rotating the middle disk

+ Product Details Size - 4"w X 34"h is the size for the duct opening measurement only

no sharp edges

with actual outer dimensions of 18

8" x 28" or 28" x 8" Cube Core Eggcrate Return Air Grille 14in diameter actual front end outer dimensions+ Product Details Size 8" x 28" or 28" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 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