The IBM part number 00D3960 is a Cable Management Arm designed for 1U rack installations and classified as a Generation III component. This arm provides a dedicated solution for routing and organizing power and data cables within a single‑unit rack space, helping to maintain a tidy and serviceable environment in IBM server or networking equipment. As a Generation III model, it reflects the latest design iteration in IBM’s cable‑management product line, offering improved flexibility and ease of use compared with earlier versions. The unit is intended for integration into standard 1U chassis, supporting efficient cable handling while preserving airflow and accessibility.