StarTech.com MSA Uncoded Compatible SFP Module, 1000BASE-ZX, 1GbE Single Mode (SMF) Fiber Optic Transceiver, 1GE Gigabit Ethernet SFP, LC Connector, 70km, 1550nm, DDM, Mini GBIC Module - Lifetime Warranty (SFP1000ZXST) - SFP (mini-GBIC) transceiver module - 1GbE - 1000Base-ZX - LC single-mode - up to 80 km - 1550 nm