StarTech.com Cisco SFP-10G-BX-D-60 Compatible SFP+ Module - 10GBASE-BX - 10 GbE Gigabit Ethernet BiDi Single Mode Fiber (SMF) Transceiver - Cisco SFP-10G-BX-D-60 Compatible Transceiver - 10GBASE-BX WDM SFP+ (10 Gbps) - 10 Gigabit BiDi Module - 1330nmTx/1270nmRx Single Mode Fiber (SMF) - 60km (37.3mi) - LC Connector & DDM - Hot-Swappable / MSA Compliant - Lifetime Warranty