24" x 28" or 28" x 24" Cube Core Eggcrate Return Air Grille fixed bar + Product Details Size –

+ Product Details Size – 8" x 8" is the size for the duct opening measurement only

+ Product Details Size - 25"w X 6"h is the size for the duct opening measurement only

+ Product Details Size – 12"w X 24"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 34 5/8" width X 22 5/8" height

24" x 28" or 28" x 24" Cube Core Eggcrate Return Air Grille fixed bar + Product Details Size –+ Product Details Size 24" x 28" or 28" x 24" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 25. 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