Startech Extreme Networks 10056 Compatible SFP Module, 1000BASE-BX-D, 1 Gigabit Ethernet Bi-Directional (BiDi) Fiber Single Strand SFP (SMF), LC 10km, Mini GBIC Transceiver SFP Module - Lifetime Warranty (10056-ST) - SFP (mini-GBIC) transceivermodul - 1GbE