100GBASE QSFP28 to 4x 25G SFP28 Breakout Direct Attach Copper Twinax Cable, Passive, 5-Meter( 16.4 ft), 30AWG.; 100% compatible with Arista CAB-Q-4S-100G-5M.; QSFP-100G to 4x SFP-25G copper direct-attach breakout cables are suitable for very short links and offer a cost-effective way to connect within racks and across adjacent racks. These breakout cables connect to a 100G QSFP port of a Arista switch on one end and to four 25G SFP ports of a Arista switch/server on the other end.; In 10Gtek's Signal Integrity Lab, we 100% passed TDR & VNA tested.
And each DAC Cable is individually tested on switches before delivery.; 10Gtek is a manufacturer of Direct Attach Copper Cable, Customized service is available.