MA-CBL-40G-50CM, a Cisco Meraki 40GbE QSFP Stacking Cable 0.5 metre. This Meraki MA-CBL-40G-50CM 40 Gigabit 0.5m Stacking Cable is assembled with QSFP+ passive Twinax cable assembly and had a data range of 40 Gigabit. This cable is suitable for use with the Cisco MS 210/225/250 Series, MS 350 Series and the MS 410 and MS 425 series of switches with stacking capability.