StarTech.com Cisco QSFP-H40G-ACU10M Compatible 10m 40G QSFP+ to QSFP+ DAC Twinax, 40G QSFP+ Copper DAC 40 Gbps Low Power Active QSFP+ Transceiver Module DAC, 40GE Cable, Firepower, ASR1000 - Lifetime Warranty (QSFPH40GAC10) - 40GBase direct attach cable - QSFP+ latched to QSFP+ latched - 10 m - twinaxial - SFF-8436 - active - black

This 40G QSFP+ cable delivers what you need most in your network connections: reliable performance. It's built to MSA specifications and fully tested to ensure seamless compatibility. The active twinaxial cable is a fully hot-pluggable solution, supporting 40 Gigabit Ethernet applications connected through QSFP+ (Quad Small Form-Factor Pluggable) ports. Designed for high-speed interconnects, this cable is intended for medium-distance applications such as across rack network switch or server connections.