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Amazon.com: Gigabit SFP to RJ45 Copper SFP Module, 1000Base-T Mini GBIC, 1.25G SFP to Ethernet Module, for Cisco GLC-T/SFP-GE-T, Meraki MA-SFP-1GB-TX, Ubiquiti UF-RJ45-1g, TP-Link TL-SM331T, Fortinet and More : Electronics