Extreme Networks DAC QSFP28-4xSFP28 Passive Copper Breakout Cable - 16.40 ft QSFP28/SFP28 Network Cable for Network Device, Switch - QSFP28 Network - Second End: 4 x SFP28 Network - 12.50 GB/s
Extreme Networks - Direct attach cable - QSFP28 to SFP28 - 16.4 ft - passive