Amazon.com: 4Pack 10GBase-LR SFP+ Transceiver, 10G Sfp Single Mode Module Duplex LC for Cisco SFP-10G-LR, Ubiquiti UF-SM-10G, D-Link, Supermicro, Netgear and Other Open Switch with DDM, 1310nm, 10km : Electronics
1000BASE-LX SFP 1310nm 10km SMF Module for Cisco - NADDOD
SFP-9510-31 - 155M to 4.25G multi-rate single-mode SFP transceiver, OC3 to OC48, Fibre Channel 4G, 1310nm, max range 10Km, dual LC connector