Support for Precision 7720 | Parts & Repairs | Dell US
Dell Precision 7720 Simple Docking Station Port Replicator USB 3.0 w/ Spacer | eBay
WD19TB For Dell K20A001 K20A USB-C Thunderbolt Docking Station W/ 180W AC Adapter - AliExpress
USB C Docking Station Dual Monitor, USB C Dock Triple Display with 2 HDMI, Displayport, Ethernet, 3 USB3.2 GEN 2 Ports, SD/TF Slots, 65W AC Power Adapter for Dell/HP/Lenovo/Macbook Pro/Type C Laptops: