Cisco Stackwise CAB-STACK cables are special interconnect cables used to connect up to nine individual Cisco Catalyst 3750 switches into a single logical unit CAB-STACK-50CM Stacking Cables are 50cm centimeters (.5M) long and used for short connections less than 18" inches Stackwise cables support 16 Gbps speeds in both directions, yielding a traffic total of 32 Gbps bandwidth bidirectionally