StarTech.com External Thunderbolt 3 to USB Controller - 3 Host Chips - 1 Each for 5Gbps Ports, 1 Shared on 10Gbps Ports - Self Powered - 3 dedicated controllers: One for each
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OWC Thunderbolt Dock with Thunderbolt cable
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BatPower | A1819 Battery for Late 2016 Mid 2017 Apple MacBook Pro 13" Four Thunderbolt 3 Ports A1706 -11.41V/49.2Wh/4300mAh