The HPE 100Gb QSFP28 to 4x25Gb SFP28 3m Direct Attach Copper Cable 845416-B21 is a high-quality networking cable designed for computing and networking setups. Made by 3M, this cable is specifically compatible with models such as 845416-B21 and 4x25Gb SFP28, ensuring a reliable and efficient connection for your networking needs. With a length of 3 meters, this cable provides a convenient and direct connection for high-speed data transfer and communication.