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