***** **********Best Quality Guranteed. *****1, QSFP+ to QSFP+ DAC Twinax Cable, 30AWG 2m Length, 40Gb QSFP+ Netowrking Card Connecting Cable; *****2, 40GbE QSFP+ Direct Attach Copper Cable, PVC Jacket, Zinc Alloy QSFP+ Connector Shell; *****3, Used in InfiniBand QDR, 40 Gigabit Ethernet, Fiber Channel, PCIe, Data Centers, High Performance Computing (HPC) & Storage; *****4, Comaptible with Cisco QSFP-H40G-CU2M, Ubiquiti, D-Link, Juniper, Huawei, Mellanox, Mikrotik and Supermicro; *****5, Dust Cap Cover the QSFP+ Connector, Antistatic Bag Packaging, CE, FCC Certificated, 3 Years Product Quality Assurance and Lifelong Technical Support.