14-3/4" Wide x 11-1/4" High x 5-1/2" Deep. This Fully Enclosed Box is Installed Between 16" Center Studs Prior to the Application of Final Exterior Siding Material. This Enclosure Typically Houses Demarcation Utility Elements for Telephone and/or Cable Television. The Enclosure has a Hinged Door That Locks With a Standard Can Wrench. It Also has a 3/4" Plywood Backboard for Mounting Utility Equipment. It has Two 1" to 2" Knockouts on the Top and Bottom.