Hart & Cooley® Return Air Grille, Series: RH45, 24 x 10 in Size, 23-1/2 in Duct Width, 9-1/2 in Duct Height, 11-3/4 in Overall Width, 1 in Overall Depth, Fixed Blade Grate, 45 deg Deflection Angle, 3/4 in Blade Spacing, Aluminum, White Painted, Domestic