StarTech.com MSA Uncoded SFP+ Module, 10GBASE-BX, 10 Gigabit Ethernet Bi-Directional (BiDi) Fiber Single Strand SFP+ Transceiver, LC 20km , Mini GBIC Transceiver SFP+ Module, Downstream - Lifetime Warranty (SFP-10GB-BX-D-20-ST) - SFP+ transceivermodul - 10GbE