Lightly used, works great.

Original product page with more details: https://www.imovr.com/zipview-single-monitor-arm.html

Beneath the ZipView’s minimal design is a reliable and smooth gas spring adjustment control that supports an 10.5″ dynamic height adjustment range. This allows the user to adjust the height and position of a monitor weighing up to 17.6 pounds with minimal effort. Retracting to a 4 inch depth and extending 21 inches, ZipView offers a comfortable viewing distance no matter the size of the workstation.

Highlights

* Gas-spring powered monitor arm that requires only a finger touch to adjust.

* High range of motion: swivels between portrait and landscape orientation and tilts up and down.

* Supports both desk clamp and grommet mounting styles.

* VESA quick mount makes attaching your monitor a breeze.

* Assembles in just minutes

* Clip-on tool holder attaches to base bracket keeping hex keys accessible

* Integrated cord management