StarTech.com Cisco SFP-10G-BX-D-20 Compatible SFP+ Module, 10GBASE-BX, 10 Gigabit Ethernet Bi-Directional BiDi Fiber Single Strand SFP+, LC 20km, Cisco ASR9000ASR1000, NCS5500, Downstream - Lifetime Warranty (SFP-10G-BX-D-20-ST) - SFP+ transceivermodul - 10GbE