Lightly used on a docking station, great condition! Details are from Lenovo's page:

Features and specifications

The ThinkPad 170W AC Adapter for W520/W530(0A36227* - United States) offers power for selected ThinkPad laptops. Features include:

Note: ThinkPad 170W AC Adapter for W520/W530 varies by country. Service parts has a listing of the various country part numbers.

Performance specifications:

Physical specifications:

Operating environment:

Manuals Version
 Release Date
Warranty Information (2.4 MB)July 20164 July 2016

Warranty

1 year - Customer Replacement Unit (CRU) Service

Hardware compatibility

DescriptionMachine - Models
ThinkPad W520All
ThinkPad W530All
ThinkPad Mini Dock Plus Series 3 - 170W- - - - -

Note: For the latest updates on the compatible systems, please refer to the Accessories Compatibility Guide.