The 365403-B21 HP 1U Cable Management Arm is a rack‑mount accessory designed to organize and route power and data cables within a standard 1U server enclosure. Engineered for use with HP equipment, the arm provides a structured pathway that keeps cables neatly separated, helping to maintain optimal airflow and reduce the risk of accidental disconnections. Its compact form factor fits within the limited vertical space of a 1U rack while offering flexible positioning for cable bundles. Installation is straightforward, using standard mounting points, and the durable construction ensures reliable performance in demanding data‑center environments.