For Mikrotik S+31DLC10D 10GBase-LR SFP+ Transceiver 10G 1310nm SMF up to 10 km | eBay
10GBase-LR SFP+ Transceiver, 10G 1310nm SMF, up to 10 km, Compatible with Cisco SFP-10G-LR, Meraki MA-SFP-10GB-LR, Ubiquiti UF-SM-10G, Mikrotik, Netgear, D-Link, Supermicro, TP-Link and More. - Walmart.com