This Cisco® QDD-400G-CU2M to Mellanox® MCP7F60-W002R26 compatible 400GBase-AOC QSFPDD to 4xQSFP56 passive TAA (Trade Acts Agreement) compliant direct attach cable has a maximum reach of 2.0m (6.6ft).It is 100% Cisco® to Mellanox® compatible and has been programmed, uniquely serialized, and data-traffic and application tested to ensure that it is compliant and functional. This direct attach cable will initialize and perform identically to Cisco® and Mellanox®'s individual cables and is built to meet or exceed Cisco® and Mellanox®'s specifications, and comply with MSA (Multi-Source Agreement) standards. We stand behind the quality of our products and proudly offer a limited lifetime warranty.