This Dell® 462-3638 to multiple OEM compatible 40GBase-CU QSFP+ to 4xSFP+ passive TAA (Trade Acts Agreement) compliant direct attach cable has a maximum reach of 50cm (1.6ft). It is 100% Dell® compatible and has been programmed to allow for connection to multiple OEMs. These OEMs include Avago D-Link Edge-corE F5 Networks Finisar Fortinet Linksys Mellanox NetAPP Zyxel and more. This cable is also 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 Dell® and the multiple OEM's individual cables and is built to meet or exceed Dell®'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.