10" x 30" or 30" x 10" Cube Core Eggcrate Return Air Grille w20h20 provides a modern look and

provides a modern look and quiet operation due to its half-inch by half-inch cube design

75" width X 37

+ Product Details Size - 18"w X 36"h is the size for the duct opening measurement only

margin-right: 8px

10" x 30" or 30" x 10" Cube Core Eggcrate Return Air Grille w20h20 provides a modern look and+ Product Details Size 10" x 30" or 30" x 10" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 75" X 31. 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