Mikrotik S-3553LC20D Tek core SFP , S-35LC20D + S-53LC20D ( TX/RX ...

S+C61DLC10D SFP+ CWDM module 10G SM 10km 1610nm LC-connector DDM

S+C59DLC10D SFP+ CWDM module 10G SM 10km 1590nm LC-connector DDM

WN-LR SFP+ 10 KM , 10Gbit Single Mod(SM) 1310nm

WN-ER SFP+ 40 KM , 10Gbit Single Mod(SM) 1310nm - SFP-10GER-31