Startech MSA Uncoded SFP Module, 1000BASE-BX, 1 Gigabit Ethernet Bi-Directional (BiDi) Fiber Single Strand SFP Transceiver (SMF), LC 10km , Mini GBIC Transceiver SFP Module, Downstream - Lifetime Warranty (SFP1000BXDST) - SFP (mini-GBIC) transceivermodul - 1GbE