Extralink 1U 19"Extralink 1U 19" are high quality rack caps. These 19 " caps are designed to keep things neat and efficient. When used in an environment with servers, they help stop airflow from front to back inside the enclosure, protecting servers from hot airAdvantages and characteristics Prevents hot and cold air from mixing to improve equipment performance.Made of high quality aluminumConceals empty spaces in the server rack for a clean and professional appearanceStabilizing flanges increase panel rigidity, reducing vibration and noise caused by airflow