StarTech.com Cisco GLC-EX-SMD Compatible SFP Module, 1000BASE-EX, 1GbE Single Mode (SMF) Fiber SMF Optic Transceiver, 1GbE SFP, LC Connector, 40km, 1310nm, DDM, Firepower, ASR920, IE2000

Lifetime Warranty (GLCEXSMDST) - SFP (mini-GBIC) transceiver module (equivalent to: Cisco GLC-EX-SMD) - GigE - 1000Base-EX - LC single-mode - up to 40 km - 1310 nm