HP 855117-001 Thunderbolt 3 power cable is a connection cable for an HP EliteBook dock. It is identified as an Elite Thunderbolt 3 power cable, intended to link the dock with a computer.
The part number is 855117-001. HP’s support discussion associates it with dock product P5Q54AA, helping identify the dock context for this cable. This description covers the specific cable and part number, rather than other Thunderbolt dock cables.