StarTech.com MSA Uncoded Compatible 0.5m 40G QSFP+ to QSFP+ Direct Attach Breakout Cable Twinax, 40 GbE QSFP+ Copper DAC 40 Gbps Low Power Passive Transceiver Module DAC, 40GE, 40GE Cable - Lifetime Warranty (QSFP40GPC05M) - 40GBase direct attach cable - QSFP+ latched to QSFP+ latched - 50 cm - twinaxial - SFF-8436 - passive - black

The QSFP40GPC05M is an MSA compliant direct-attach copper QSFP+ cable that's designed, programmed and tested to work in 40G network deployments. It delivers dependable 40 GbE connectivity over copper cabling, which is a cost-effective alternative to fiber-optic cable setups. This passive Twinax cable supports 40 Gigabit Ethernet applications connected through QSFP+ (Mini-GBIC) ports. The cable is hot-swappable, making upgrades and replacements seamless by minimizing network disruptions. At 0.5 meters long and designed for high-speed performance, this copper QSFP+ cable is ideal for medium-distance applications such as across-rack network switch or server connections.