Could this be clamped on a bar above my work space and used in a sort of upside down manner? There is no nearby wall or desk.

It has to be in it's upright position. The way it's build weight (from above) keeps it in place. If you try to mount it upside down it won't work.

What diameter does the pole/pipe/mount need to be to fit or work with this extension arm?

For this arm it is 1.38" (35mm). It is not compatible with the LX HD mount which has a 1.57" (40mm) pole

Will this work with the LX Dual Stacking Arm in order to have a longer arm at the top height?

The top arm is of fixed length and is non adjustable except for up-down tension. The extension allows the unit to expand the length from the wall bracket to the device. The device is raised in height by the height of the extension somewhere round six inches. Only two extensions can be used (raising height 12 inches aprox) and bracket on wall can be mounted lower or higher to set the device to be at the desired level. Excellent quality and durable product, mine is used with a laptop that folds away on the wall when not in use.

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Ergotron – LX Monitor Arm Extension – Add-on for LX Desk and LX Wall Monitor Arms, LX Keyboard Arm – White

Ergotron – LX Monitor Arm Extension – Add-on for LX Desk and LX Wall Monitor Arms, LX Keyboard Arm – White

Product ID: 442334283

📏9-inch extension for extra reach

🔄Additional pivot for max adjustability

🧹Integrated cable management

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VT31292

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Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

📈 Elevate your monitor game—extend, adjust, and conquer your workspace!

TAILORED FLEXIBILITY - Extra pivot point means personalized ergonomic positioning for every unique workflow and body type.
EFFORTLESS INSTALLATION - Plug-and-play design lets you upgrade your arm in minutes without tools or hassle—because your time is valuable.
BUILT TO OUTLAST YOUR HUSTLE - Ergotron’s 10-year warranty and rigorous quality testing ensure your monitor stays rock-solid through every grind.
EXTEND YOUR WORKSPACE FREEDOM - Add 9 inches of sleek, seamless reach to your existing LX Arm setup—perfect for dynamic, multi-tasking pros.
CLUTTER FREE CLEAN DESK VIBES - Built-in cable routing keeps your workspace minimalist and distraction-free, boosting focus and style.

The Ergotron LX Monitor Arm Extension adds a precise 9-inch reach to compatible LX Desk, Wall, or Keyboard Arms, enhancing ergonomic flexibility with an extra pivot point and integrated cable management. Designed for quick installation and backed by a 10-year warranty, this durable white extension optimizes your workspace for professional multitasking while maintaining a clean, modern aesthetic.

Specifications

ASIN	B09HTZVK4F
Best Sellers Rank	#635 in Computer Monitor Arms
Brand	Ergotron
Color	White
Customer Reviews	4.5 4.5 out of 5 stars (935)
Date First Available	February 23, 2022
Is Discontinued By Manufacturer	No
Item Dimensions LxWxH	13.25 x 4.75 x 2.5 inches
Item Weight	7.2 ounces
Item model number	45-289-216
Manufacturer	Ergotron
Product Dimensions	13.25 x 4.75 x 2.5 inches

Reviews

B**W

1.02.2023

M**E

4.09.2025

N**R

17.05.2023

G**Y

13.12.2023

J**N

2.09.2025

O**H

24.10.2014

M**A

6.11.2020

J**N

16.04.2024

M**U

6.04.2026

M**K

16.11.2022

L**9

17.07.2018

I**.

7.04.2023

Z**P

13.07.2023

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