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+ transceiver module - 10GbE - 10GBase-BX-D - LC single-mode - up to 20 km - 1330 (TX) / 1270 (RX) nm