Filtered Return Air Grille, Overall Depth 1 1/8 in, Overall Height 14 5/8 in, Overall Width 14 5/8 in, Maximum Opening Height 12 in, Maximum Opening Width 12 in, Filter Depth Not Applicable, Filter Height Not Applicable, Filter Width Not Applicable, Grille Color White, Grille Material Steel, Material Steel, Damper Material Not Applicable, Bar Spacing 1/2 in, Face Design Louvered, Airflow Directions One-Way, Adjustable Blades No, Mounting Location Ceiling or Wall, Mounting Style Surface Mount