24" x 28" or 28" x 24" Cube Core Eggcrate Return Air Grille fixed bar Filter grille features a user-friendly

Filter grille features a user-friendly plastic latch that requires no screwdriver for opening

+ Product Details Size - 20"w X 20"h is the size for the duct opening measurement only

Crafted for durability and rust-resistance

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 Filter grille features a user-friendly+ 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