Tp-Link TL-SM5110-LR 10G-LR SFP+ LC Transceiver, Single-Mode SFP Module - 

TP-Link TL-SM5110-LR - 10G-LR SFP+ LC Transceiver, Single-Mode SFP Module - Plug and Play - LC Duplex Interface - Hot Pluggable - Up to 10km Distance ...