40GbE QSFP+ to 4xSFP+ DAC Direct Attach Copper Twinax Breakout Cable, Passive, 2-Meter(6.5ft) (Note that this length includes two connectors.) 30AWG Widely compatible with Cisco QSFP-4SFP10G-CU2M Devices, and other open switch Devices 40G QSFP+ to 4xSFP+ Cable can connect 40 Gigabit switch, router, server, NIC, or other fiber optic equipments with QSFP+ ports to 10 Gigabit equipments with SFP+ port for Network Attached Storage, Storage Area Network and High Performance Computing In 10Gtek's Signal Integrity Lab, we 100% passed TDR & VNA tested. And each DAC Cable is individually tested on switches before delivery 10Gtek offer more compatible options, if your brands not listed above, pls contact us. Compatible for Cisco P/N: QSFP-4SFP10G-CU2M 40GBASE-CR4 QSFP+ to four 10GBASE-CU SFP+ direct attach breakout cable assembly, 2 meter passive Data Rate:40Gb/s Length: 2-meter Cable Type: Passive Twinax Temp.(?):0~70 Application: Data Center Switching Cisco Nexus 3000 Series Cisco Nexus 5000 Series Cisco Nexus 6000 Series Cisco Nexus 7000 Series Cisco Nexus 9000 Series (Modular 9500) Cisco Nexus 9000 Series (Fixed 9300) Cisco Nexus 9000 Series (Modular 9500)ACI Mode Cisco Nexus 9000 Series (Fixed 9300)ACI Mode Catalyst 6500 Series Catalyst 4500 Series Catalyst 4500-X Series Catalyst 3850 Series Cisco Unified Computing System Router CRS Router Series ASR 9000 Series Router NCS 6000 Router