Cisco 1000BaseTX Copper SFP for ASR and SPA - SFP-GE-T
Gigabit Single Mode SFP Transceiver for Cisco GLC-LH-SMD, 1000Base-LX/LH Mini GBIC, 1.25G SFP LC Module, 1310nm SMF, up to 20km, for Cisco, Meraki,Ubiquiti UF-SM-1G,TP-Link TL-SM311LS and More, 2-Pack
Gigabit Interface Converter (GBIC) Module and Small Form-Factor Pluggable ( SFP) GBIC Module Install. Info. and Specifications - Cisco