Cisco QSFP-H40G-CU3M 40gbase-cr4 Passive Copper Cable, Wire Gauge 30 AWG, Cable Length 118.1 in [3000 mm], Connector A/B 1 - QSFP+, Data Transfer Rate 40Gbps, Impedance 100 Ohm, Networks 40 Gbps. The Cisco 40GBASE QSFP (Quad Small Form-Factor Pluggable) portfolio offers customers a wide variety of high-density and low-power 40 Gigabit Ethernet connectivity options for data center, high-performance computing.