The Middle Atlantic BR1 1SP Horizontal Panel is a black plastic panel designed for rackmount cabinets and frames. It is compatible with the Middle Atlantic brand and features a brush grommet for cable management. With dimensions of 1-3/4" x 19" x 2.92", this panel is designed to fit a rack unit height of 1U and a rack unit width of 19 inches. It includes one side panel and is manufactured by Middle Atlantic Products, known for high-quality networking solutions. This panel is ideal for organizing and hiding cables in a server or networking setup.