AirMate® Return Air Grille, Series: 170, 10 x 10 in, 9-1/2 in Duct Width, 9-7/8 in Duct Height, 11-3/4 in Overall Width, 5/16 in Overall Depth, 138 to 276 cfm, Effective Area: 0.46 sq-ft, 40 deg Deflection, 1/2 in Blade Spacing, Steel, Bright White Enamel, Import