Intellinet Gigabit Ethernet to SFP Media Converter (510493)
Gigabit Ethernet Media Converter, MultiMode Dual LC Fiber to Ethernet RJ45 Converter for 10/100/1000Base-Tx to 1000Base-SX(with a SFP MMF 850-nm Module), UL Certified, up to 550-m - Newegg.com
Transition TN-SFP-GE-T | Hardened Cisco Compatible Gigabit S
Amazon.com: Cable Matters 1000BASE-T Gigabit SFP to RJ45 Copper Ethernet Modular Transceiver for Cisco, Ubiquiti, TP-Link, Huawei, Netgear, and Supermicro Equipment
What is an SFP (Small Form Factor Pluggable) Port?
Amazon.com: Gigabit Multi-Mode LC Fiber to Ethernet Media Converter with A SFP SX Module, 1.25G Fiber to Copper RJ45 Media Converter, 1000Base-SX to 10/100/1000Base-TX, MMF, Transmission up to 550 meters/1804 ft
SFP-7050-55 - Gigabit single-mode SFP transceiver, 1000Base-ZX, 1550nm, max range 50Km, dual LC connector