The Slim profile framing of this Slim Style Enclosed Letterboard takes up less space. Satin Anodized aluminum frame. Shatter-resistant acrylic window. Lockable doors mounted on full-length piano hinges (two keys included). Standard Black felt letterboard interior. Door hinged in back. 3/4″ Helvetica letter and number set included with letterboards. For indoor use only. Case Dimensions: 1-5/16″ face frame, 1-13/16″ exterior depth, 1/2″ interior depth. Includes 1 door. Black interior, Satin frame finish. 36″W x 36″H overall.