StarTech.com USB C to Mini DisplayPort Adapter, 4K 60Hz USB-C to mDP Adapter Dongle, USB Type-C to Mini DP Monitor/Display, Video Converter, Works w/ Thunderbolt 3, 12" Long Attached Cable

DP Alt Mode, mDP 1.2 (CDP2MDPEC) - DisplayPort adapter - 24 pin USB-C (M) to Mini DisplayPort (F) - Displayport 1.2/Thunderbolt 3 - 30.6 cm - 4K60Hz (3840 x 2160) support - grey