6" x 20" or 20" x 6" Cube Core Eggcrate Return Air Grille Compatible With Duct 6in + Product Details Outer dimensions:

+ Product Details Outer dimensions: 15

+ Product Details Size – 16"w X 36"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 28 5/8" width X 8 5/8" height

75"H – fits a 10" X 6" duct opening

6" x 20" or 20" x 6" Cube Core Eggcrate Return Air Grille Compatible With Duct 6in + Product Details Outer dimensions:+ Product Details Size 6" x 20" or 20" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 75" X 21. 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