10-pack: StarTech Gigabit Fiber SFP Transceiver Module Delivers reliable Gigabit Ethernet connections for 1000Base-SX compliant networks Cisco compatible, equivalent to GLC-SX-MM SFP form factor, Multimode with maximum distance Supports speeds up to1250 Mbps Wave length: 850 nm Supports distances up to 550 m Fibre LC Duplex female