Ergotron LX Pro mounting kit (Large Base, Table Mount) MPN 98-729-292. This is a conversion kit for the LX Pro monitor arm system, providing a larger mounting base for desktop installations. Made of aluminum and steel, it converts LX Pro arms for free-standing desk use and integrates with LX Pro accessories.

Features:

• Compatibility with LX Pro: Supports single monitors up to ~34”.
• Load capacity: ~1.8–10.0 kg (4–22 lb).
• Vertical travel: ~33 cm (13 in).
• Tilt: Up to 85°.
• Rotation: 360°.

The exact list of kit parts and the dimensions of the base are not disclosed in the available sources.