This is a Mellanox® MFS4R12CB-020 compatible 40GBase-AOC QSFP+ to QSFP+ direct attach cable that operates over active MMF with a maximum reach of 20.0m (65.62ft). 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. 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.