24-Port eXtreme Cat 6+ Flat 110-Style 1RU Patch Panel with Cable Management Bar, BlackeXtreme 6+ Universal Patch Panel, 24 Port, 1RU, CAT 6. Cable management bar included. Leviton eXtreme 6+ CAT 6 Flat 110 Style patch panels are designed for use on 19 in. standard racks and cabinets. The patch panels include Levitons patented Retention Force Technology which promotes consistent performance over the life of the system. Installer friendly design allows for quick installation due to standard 110 terminations on the rear of the panel,