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.

Ergotron Lx Extension Bright White Wall

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Description

🖥️ Elevate your desk game with precision and style!

VALUE MEETS QUALITY - Premium build at a price that respects your budget
ROCK SOLID STABILITY - Engineered to hold ultra-wide screens without any sag or wobble
EFFORTLESS ADJUSTMENT - Precision design ensures smooth, hassle-free positioning every time
EXTEND YOUR WORKSPACE - Seamlessly expand your monitor reach for ultimate desk freedom
SLEEK BRIGHT WHITE FINISH - Modern, clean aesthetic that elevates any professional setup

The Ergotron LX Extension Bright White Wall mount is a lightweight yet robust extension arm designed to support ultra-wide monitors up to 34 inches without sagging. Its bright white finish complements modern workspaces, while the easy installation and precise adjustment features make it a top choice for professionals seeking to optimize their desk ergonomics and aesthetics.

Reviews

限**ノ

自分はエルゴトロンLXにこれをつけて延長して、34インチのウルトラワイドモニターを設置しています。それでもたわむことなくしっかり支えてくれてます。デスクがすっきりして最高です。

4.12.2025

A**ー

延長アームの先にキーボード用のブラケットを付けてますが、取り付け位置によっては水平が出ないのでこの小さな不満がなければ星五つかな？

21.02.2026

T**A

自由度を上げるために購入。モニターの位置調整自由度は上がったが、ポール周辺の空間利用効率は落ちた。左右の位置調整時にはアームの物理的構造上アームが前後に出っ張るため、机上のモニター位置との兼ね合いの考慮が必要だった。これと値段で星２減

8.04.2025

底**生

価格は高いが、耐荷重や品質が優れている。

14.10.2025

北**空

高額だが良い

1.10.2025

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TrustScore 4.5 | 7,300+ reviews

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ASIN	B09HTZVK4F
Best Sellers Rank	141,155 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 823 in Computer Monitor Arms
Item model number	45-289-216
Manufacturer	ERGOTRON
Product Dimensions	33.66 x 12.07 x 6.35 cm; 204 g

Ergotron LX Extension Bright White Wall

Description

Specifications

Reviews

Common Questions