Utility Shelf; 15" Deep; 2U; w/ Elongated Vent Holes for Air Circulation / The 2U Vented Rack Shelf from Gator is an accessory that was designed to be installed in a standard 19 rack. It enables you to add a storage shelf to a rack. Air passageways have been cut into its 16 gauge steel to help keep your equipment ventilated. The steel used to construct this shelf has been cold rolled to give it additional strength. The rear of the shelf is flanged for added rigidity