Startech Brocade 40G-QSFP-LR4 Compatible QSFP+ Module, 40GBASE-LR4, 40GbE Single Mode Fiber SMF Optic Transceiver, 40GE Gigabit Ethernet QSFP+, LC Connector, 10km, 1270nm to 1330nm DDM - Lifetime Warranty (40G-QSFP-LR4-ST) - QSFP+ transceivermodul - 40GbE