20" x 26" or 26" x 20" Cube Core Eggcrate Return Air Grille Color_Aluminum or office environments

or office environments

+ Product Details Perfect Fit & Easy Sizing - Designed for a 6" x 18" or 18" x 6" duct opening (measured at the opening)

actual front end outer dimensions are approximately 32 5/8" width X 26 5/8" height -

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

20" x 26" or 26" x 20" Cube Core Eggcrate Return Air Grille Color_Aluminum or office environments+ Product Details Size 20" x 26 or 26" x 20" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 75" X 27. 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