ThinkPad USB-C Mechanical Dock Family
Lenovo ThinkPad Basic, Pro and Ultra Docking Stations
$271 | Basic | 40AG0090US | 1 Monitor
$300 | Pro | 40AH0135US | 2 Monitors
$356 | Ultra | 40AJ0135US | 3 Monitors
More Information comparing the 3 primary USB-C Docks