StarTech.com Brocade 40G-QSFP-LR4 Compatible QSFP+ Module - 40GBase-LR4 Fiber Optical Transceiver (40G-QSFP-LR4-ST) - For Optical Network, Data Networking - 1 LC 40GBase-LR4 Network - Optical Fiber Single-mode - 40 Gigabit Ethernet - 40GBase-LR4 - Hot-swappable: