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

+ Product Details Size – 28"w X 24"h is the size for the duct opening measurement only

+ Product Description Introducing the 3-coned supply grille for a T-bar lay-in

This thoughtful design ensures optimal air circulation for your HVAC system

+ Product Details Size – 20" x 26 or 26" x 20" is the size for the duct opening measurement only

24" x 28" or 28" x 24" Cube Core Eggcrate Return Air Grille Aluminum - Cube Core + 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