Startech Juniper RX-70KM-SFP Compatible SFP Module, 1000BASE-ZX, 1GbE Single Mode (SMF) Fiber SMF Optic Transceiver, 1GE Gigabit Ethernet SFP, LC Connector 70km, 1550nm, DDM, Mini GBIC - Lifetime Warranty (RX70KMSFPST) - SFP (mini-GBIC) transceivermodul - 1GbE