6" x 20" or 20" x 6" Cube Core Eggcrate Return Air Grille Compatible With Duct 6in actual front end outer dimensions

actual front end outer dimensions are approximately 14 5/8" width X 22 5/8" height

customize cuts and flares as needed

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

+ Product Details Outer dimensions: 15

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

6" x 20" or 20" x 6" Cube Core Eggcrate Return Air Grille Compatible With Duct 6in actual front end 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