StarTech.com Juniper RX-550M-SFP Compatible SFP Module, 1000BASE-SX, 1GbE Multimode Fiber MMF Optic Transceiver, 1GE Gigabit Ethernet SFP, LC Connector, 550m, 850nm, DDM, Mini GBIC Module - Lifetime Warranty (RX550MSFPST) - SFP (mini-GBIC) transceivermodul - 1GbE