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StarTech.com Cisco Compatible Gigabit RJ45 Copper SFP Transceiver Module Mini-GBIC - 10/100/1000Base-T

Fully compliant with MSA standards this hot pluggable module can be installed into any networking device with an MSA compliant or Cisco compliant port
A convenient way to add a copper connection to an SFP type switch that would typically be used for fiber SFPs
Up to 125 Gbps bi-directional communication
101001000 Mbps Auto-Negotiation
Complies with SFP Multi-Source Agreements standards MSA
RJ45 Ethernet connector