22" x 30" or 30" x 22" Cube Core Eggcrate Return Air Grille Insulated Line + Product Details Size –

+ Product Details Size – 18"w X 22"h is the size for the duct opening measurement only

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

Pack of 4 Pieces

The powder-coat finish lends a smooth

22" x 30" or 30" x 22" Cube Core Eggcrate Return Air Grille Insulated Line + Product Details Size –+ 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