This is a Dell 462-3639 compatible 40GBase-CU QSFP+ to 4xSFP+ direct attach cable that operates over passive copper with a maximum reach of 1.0m (3.28ft). It has been programmed, uniquely serialized, and data-traffic and application tested to ensure it is 100% compliant and functional. Our direct attach cables are built to comply with MSA (Multi-Source Agreement) standards. The actual part shipped may have a different part number, but will be functionally identical and 100% compatible. All of our twinax and AOC cables are Trade Agreements Act (TAA) compliant. We stand behind the quality of our products and proudly offer a limited lifetime warranty.Dell compatiblePassive cabling to provide reliable connectivity1.0m (3.28ft) in length to fit the needs of your applicationComplies with all multi-source agreement (MSA) standards to ensure seamless network integrationApplication and environment tested and guaranteed to work