Improve the organization & appearance of your rack in seconds, with a tool-less solid blanking panel This 4U blanking panel helps improve the appearance & airflow of your EIA-310 compliant 19 in. server rack. Professional Look This solid blank rack panel creates a clean & professional look by covering empty rack spaces & visible cables, for a more organized server room. Improve Airflow When used to cover unused rack units, this 4RU panel can help to control airflow & in certain applications, control internal temperatures by reducing the recirculation of hot air within the rack, created when unused spaces are left uncovered. RKPNL4U is backed by a 2-year Star Tech.com warranty & free lifetime technical support.