Lone Star Racks' blanking panels provide a quick and simple solution to fill any empty spaces on the server rack, giving the server rack a much more clean and professional look. Concealing these empty spaces allows for more control of airflow inside the rack by preventing the mixing of hot and cold air. We offer steel flanged filler panels, as well as tool-less options. Brush panels and panels with temperature strips are also available. These filler panels are compatible with all EIA standard 19" racks with square holes.