13 Inch Brass Mail & Letter Flap Slot (Lifetime Polished Brass Finish) - measures 3 1/16 inches by 13 inches. This mail slot has an opening of approximately 11 inches wide and 2 inches tall. Comes with both sides. Exterior flap is spring-loaded and this comes with a back finish plate. For use on both wood and metal doors. Available in Polished Brass, Antique Brass, Oil Rubbed Bronze, Satin Nickel, Antique Nickel, Black, Chrome, Brushed Chrome and Lifetime PVD Brass (shown). Comes complete with the mounting hardware. For hollow core doors, a mail sleeve is also available (part number DTMS005U32D).