Qnap CAB-NIC40G30M-QSFP Direct Attach Cable, Form Factor QSFP+ DAC, Data Rate 40 Gb/s, Supply Voltage 3.3V, Length 3 meter, Impedance 100 Ω, Wire Gauge 26 AWG, Minimum bend radius 30mm, Jacket Type PVC, Connector QSFP+/QSFP+. This Optcore 3-meter 40G QSFP+ DAC copper cable is an ideal replacement for QNAP CAB-NIC40G30M-QSFP. It’s suitable for use with QNAP 40G QSFP+ ports of switches, servers, and adapter cards in data center networks application.