Amazon.com: 6COM 10GBase-LR SFP+ Transceiver, 10G LC Single Mode Module for Cisco SFP-10G-LR, Meraki MA-SFP-10GB-LR, Ubiquiti UF-SM-10G, Mikrotik, D-Link, Supermicro, Netgear, Qnap NAS (DDM, 1310nm, 10km) : Electronics
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
SFP-10G-LR-S= Price - Cisco Original New Transceiver