Extralink 1U 19" Extralink 1U 19" are high-quality plugs for rack cabinets. These 19-inch plugs are designed to keep your work space tidy and efficient. When used in a server environment, they help stop front-to-back airflow inside the case, protecting servers from warm air. Benefits and Features Prevents hot and cold air from mixing to improve equipment performance. Made of high-quality aluminum Hides empty spaces in the server rack, ensuring a clean and professional appearance Stabilization flanges increase the stiffness of the panels, reducing vibration and noise caused by airflow