Return Air Grille, Overall Depth 2 5/8 in, Maximum Opening Height 22 in, Maximum Opening Width 22 in, Grille Color White, Grille Material Steel, Material Steel, Damper Material Steel, Bar Spacing 3/4 in, Face Design Louvered, Adjustable Blades Yes, Mounting Style Surface Mount, Blade Angle 35 Degrees , Product Type Return Air Grille, Series 350