This Arista Networks® CAB-D-4Q-400G-2-5M to Mellanox® MCP7F60-W02AR26 compatible 400GBase-CU QSFPDD to 4xQSFP56 passive TAA (Trade Acts Agreement) compliant direct attach cable has a maximum reach of 2.5m (8.2ft). It is 100% Arista Networks® 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 Arista Networks® and Mellanox®'s individual cables and is built to meet or exceed Arista Networks® 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.