[This review was collected as part of a promotion.] This is good for Gen8 and below version of the Carbon X1 devices. If you upgrade to new docks, the USBC type 4 cable will do everything needed.
[This review was collected as part of a promotion.] Needed to replace the thunderbolt connection cord on my Lenovo docking station. This cord works on the Thunderbolt 4 and Thunderbolt 3 docking stations. It works fantastic and is exactly what I was looking for. The price is reasonable and cheaper than getting the v3 cord. Highly recommend
[This review was collected as part of a promotion.] This "ThinkPad Thunderbolt 4 WorkStation Dock Split Cable 0.7m" (Part Number: 4X91K16970) works perfectly with my ThinkPad Thunderbolt 3 Workstation Dock Gen 2 (Part Number: 40ANY230US) & my P15 Gen 1 (20SUS09800) Laptop (ThinkPad).
It was both cheaper and more available than the specified replacement Thunderbolt 3 split cable (Part Number: 5C10V25713) that my dock came with.