netshelter Sx Networking Enclosure Expands Apc's Superior It Enclosure Line With Improved Support For High Density Networking Applications. Integrated High Density Cable Managers And Improved Cable Access Roof Provide Support For Large Cable Bundles. When Combined With The Side Airflow Duct Kit, The Networking Enclosure Ensures Complete Isolation Of Cold Intake And Hot Exhaust Air For Large Switches And San Directors.