StarTech.com 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) transceiver module - 1GbE - 1000Base-BX - LC single-mode - up to 10 km - 1310 (RX) / 1490 (TX) nm