https://store.cablesplususa.com/fiber-optic-transceivers/cisco-ons-sc-z3-1570/
ONS-SC-Z3-1570-LW - OC48C/STM-16/GE CWDM SFP Transceiver, SM 1570nm, LC
Cisco Compatible, OC48C/STM-16/GE CWDM SFP (mini-GBIC) Transceiver, 2.488Gb/s, 80km, Single Mode, 1570, Duplex LC, 3.3V