SFP-5040-WB - Fast Ethernet OC3 or STM-1 BiDirectional single strand WDM SFP transceiver, Tx:1550nm/Rx:1310nm, type B, max range 40Km, single LC connector
How to Use 10G SFP+ Long-distance SFP Module? | FiberMall
What is the maximum distance for 10g sfp?
SFP-7080-Cxx - CWDM SFP transceivers - 1.25Gbps Gigabit rate, 1271nm to 1611nm, 80Km range