Return Air Grille, Overall Depth 1/2 in, Overall Height 11 1/2 in, Overall Width 7 1/2 in, Maximum Opening Height 9 3/4 in, Maximum Opening Width 5 3/4 in, Filter Depth 1/2 in, Filter Height 11 1/2 in, Filter Width 7 1/2 in, Grille Color Black, Grille Material Steel, Material Steel, Damper Material Not Applicable, Bar Spacing Not Applicable, Face Design Decorative, Airflow Directions One-Way, Adjustable Blades No, Mounting Location Floor, Mounting Style Surface Mount, Blade Angle 180 Degrees