Protect and preserve important communications with the Quartet® Radius Design Letter Directory. The shatterproof window and locking door make the enclosed letter board an ideal place to safely display messaging in indoor environments. The hard-working surface holds messages securely in place. White plastic letters (sold separately) stand out on a solid black background for maximum readability. The durable, powder-coat finish delivers long-lasting, attractive performance. The lightweight, aluminum frame helps makes the directory easy to install.