This is a Cisco® CAB-STK-E-3M compatible 3.0m (9.8ft) FlexStack male to male black stacking cable that is used for high speed data transfer. This part is specifically made to work with Cisco® devices equipped with FlexStack ports. This stacking cable features FlexStack to FlexStack connectors for connectivity between network appliances. These cables are application tested and guaranteed to work 100% of the time.