10Gtek 100G QSFP28 DAC Cable - 100GBASE-CR4 QSFP28 to QSFP28 Passive Direct Attach Copper Twinax Cable for Cisco QSFP-100G-CU0.5M, Ubiquiti, Arista, Supermicro and More, 0.5-Meter(1.6ft)