This is a Cisco QSFP-4SFP25G-CU2M compatible 100GBase-CU QSFP28 to 4xSFP28 direct attach cable that operates over passive copper with a maximum reach of 2.0m (6.6ft). 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. QSFP-4SFP25G-CU2M-AO