Ergotron LX Arm Extension &Collar Kit - Polished Aluminum

Convert an existing LX Arm to hold two monitors, creating an LX Dual Stacking Arm configuration. This kit easily attaches to the pole of the desk mount base.

Recommended for use with the LX Desk Mount LCD Arm, Tall Pole.


  • Easily add a second monitor to your LX desk mount to hold another monitor or laptop computer
  • Cable management feature routes cables under the arm, out of the way
  • Easy to use: Simple installation and effortless operation
  • Patented Constant Force™ lift-and-pivot motion technology
  • Passes Ergotron’s 10,000-cycle motion test, which ensures years of trouble-free height adjustment

Product Information

Part Number



LX Arm, Extension and Collar Kit


LX arm


pole collar


attachment hardware

Can be configured to hold a laptop instead of an LCD display; also order the accessory Notebook Tray (50-193-200)

Weight Capacity

5 to 25 lbs (2.3 to 11.3 kg). With monitors greater than 20 lbs (9.1 kg) in weight, the vertical range of motion may be reduced up to 4.5" (11 cm) for a total height range of 8.5" (22 cm)

Mounting Standards

VESA FDMI MIS-D, 100/75, C (hole pattern: 100 x 100 mm &75 x 75 mm)

Quality Tested

10,000-cycle test applied to lift mechanism, ensuring years of trouble-free height adjustment

Complies with all international environmental regulations related to its design, manufacture and packaging. Read more about our Environmentally Responsible Process

Arm can be used with or without Extension; attaches directly to pole or at end of Extension

Approved for use with the LX Desk Mount LCD Arm, Tall Pole (45-295-026). This kit is not compatible with LX Sit-Stand Arm systems

Shipping Dimensions

17.5" x 7.75" x 6.5" (44 x 20 x 17 cm)

Shipping Weight

5 lbs (2.3 kg)


Ten (10) years

No additional files, specification sheets, guides or documentation found for product.

Warranty: 60 Month Manufacturers Return To Base

Full manufacturers warranty details are available at the manufacturers web site.

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These terms are in addition to and do not affect any terms, conditions, guarantees and warranties implied by law.

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