14-3/4" Wide x 24" High x 5-3/4" Deep. This is a Large Capacity Enclosure That Can Accommodate 25-Pair Protectors and Modular Interface Telephone Apparatus. The 3/4" Plywood Bbackboard Simplifies Equipment Mounting With two 2" Knockouts Positioned in the Bottom of the Case Plate. Simply Fasten the Enclosure Between 16" Center Studs Prior to Application of Final Exterior Siding Material. The Fully Enclosed Hinged Door Keeps Weather and Insects From Entering the Structure and Locks With a Standard Can Wrench.