Heavy-duty steel enclosure designed for the Apple Mac Pro Tower. This unit is designed to be installed beneath or on top of the desk with mounting screws provided. Easy installation. New T-shaped front cross bar. Includes a combination padlock. Inside Dimensions: 20.75 inches H x 9.25 inches W x 17-21 inches D. Color: Black. Optional monitor kit available (Part# 3007-BK). Optional adhesive mat can be purchased for desktop mounting offering 20,000 lbs holding strength and patented self-remove feature (Part# ADVMAT).