StarTech.com Arista Networks SFP-1G-LH Compatible SFP Module, 1000BASE-LH, 1GbE Single Mode (SMF) Fiber SMF Optic Transceiver, 1GE Gigabit Ethernet SFP, LC Connector, 40km, 1310nm, DDM - Lifetime Warranty (AR-SFP-1G-LH-ST) - SFP (mini-GBIC) transceivermodul - 1GbE