Black Box 40GBase direct attach cable - 1.6 ft - black - QSFP-H40G-CU50CM-BB - Network Cables - CDW.com
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Amazon.com: 40G QSFP+ DAC Cable - 40GBASE-CR4 Passive Direct Attach Copper Twinax QSFP Cable for Cisco QSFP-H40G-CU50CM, Meraki MA-CBL-40G-50CM, Mikrotik, Open Switch Devices, 0.5-Meter(1.6ft) : Electronics
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StarTech.com Cisco QSFP-4SFP10G-CU5M Compatible 5m 1x QSFP+ to 4x SFP+ Direct Attach Breakout Cable - 40GbE - QSFP+ Copper DAC 40Gbps Low Power Passive Twinax - Cisco QSFP-4SFP10G-CU5M Compatible 5m direct attached
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