AddOn's CAB-SFP-50CM-AO is a Cisco Compatible 0.5M (1.64ft) SFP Ethernet Copper TWINAX Cable. This Twinaxial cable is a hot-swappable input/output device that plugs into a 1 Gigabit Ethernet slot, linking the port with a compatible Cisco Series Switch, and is universal and will also work with other OEM switches. It is a cost-effective way to connect within racks and across adjacent racks. AddOn's TWINAX cables are 100% compliant for all of our networking product lines and perform identically to the OEM cable, enabling customers to meet the needs of their data center environment.