Hart & Cooley® Ceiling/Sidewall Register, 2-Way, Series: 661, 12 x 4 in, 11-7/16 in Duct Width, 3-1/2 in Duct Height, 13-1/4 in Overall Width, 1-5/8 in Overall Depth, 55 to 180 cfm, 20 deg Deflection, 1/3 in Blade Spacing, Steel, Bright White Enamel, Domestic