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