The black GRW2012509 Rackworks Hinged Wall Mounted Rack from Gator Cases features a hinged back, double section, and welded frame construction. The rack consists of 18 gauge removable side panels with spring latches and an 18 gauge SPCC cold-rolled steel top and bottom. There are 11 gauge drilled and tapped front and rear rack rails, and the top is perforated to accommodate a fan. The rack U number is printed on the rack rails, and there is a door with toughened glass, vented sides, and a spring loaded push and turn locking system. There are 10/32 rack screws, a 5/8" knockout design for a VHF/UHF antenna, and a 10 x 10" rear access knockout for cables. Additional cable entry knockouts on the top and bottom include knockouts with 1/2", 5/8", 1.0", and 1 1/2" dimensions.