The Corning Closet Connector Housing accepts CCH cassettes and CCh modules. The 1U, 2U and 3U options feature a slide-out tray and see-through, removable top covers. The CCH-04U features a clear door, removable front and rear enclosures and a platinum-colored interior for maximum visibility and access. These units are design to accomodate 19" racks. All size housings have field-installable lock kits available for both front and rear doors.