22" x 30" or 30" x 22" Cube Core Eggcrate Return Air Grille Insulated Line featuring a 8" round duct

featuring a 8" round duct opening

Pack of 4 Pieces

The crank handle lever makes it easy to adjust to every weather situation

this filter grille never rusts and withstands long-term use in any environment

or commercial environments

22" x 30" or 30" x 22" Cube Core Eggcrate Return Air Grille Insulated Line featuring a 8" round duct+ Product Details Size 22" x 30" or 30" x 22" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 23. 75" X 31. 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