Return Air Grilles Overall Depth 1/2 in Overall Height 47 3/4 in Overall Width 23 3/4 in Maximum Opening Height 48 in Maximum Opening Width 24 in Grille Color Silver Grille Material Aluminum Material Aluminum Bar Spacing 1/2 in Face Design Egg Crate Airflow Directions Four-Way Mounting Style Lay-In Blade Angle 90 Degrees Finish Mill Product Type Eggcrate Cubed Core Package Quantity 2