StarTech.com MSA Uncoded Compatible QSFP+ Module, 40GBASE-LR4, 40GbE Single Mode SMF Fiber Optic Transceiver, 40GE Gigabit Ethernet QSFP+, LC Connector 10km, 1270nm to 1330nm, DDM, 40Gbps - Lifetime Warranty (QSFP40LR4ST) - QSFP+ transceivermodul - 40GbE