TRUaire™ Adjustable Bar Type Supply Registers deliver high capacity airflow, with style, and solid construction. There are three different models to choose from, and all feature SmoothGlide™ Technology, pristine white powder coat finish, and recessed screw holes. All three also offer options. These include: choice of vertical or horizontal blade positioning, and a choice to add our exclusive SmoothGlide™ Multi-Shutter Damper, our SmoothGlide™ Opposed Blade Damper, or no damper at all. TRUaire™ Ceiling/Sidewall Register, 1-Way, Series: 210 Series, 24 x 6 in, 5-1/2 in Duct Height, 25-3/4 in Overall Width, 2-1/4 in Overall Depth, Adjustable Vertical Blade, 310 to 1555 cfm, 120 sq-in, 3/4 in Blade Spacing, Steel, Powder Coated, Import