Ergotron LX Single Monitor Arm
Up to 34 in, flat or curved, 7–25 lb. Polished aluminum.
- Up to 34 in
- 7–25 lb
- Clamp or grommet
Desk setup
Best monitor arm for an ultrawide monitor
Our pick for a 34-inch ultrawide is the Ergotron LX: it supports flat or curved screens up to 34 inches and 7–25 lb. If your ultrawide is 32 inches or smaller and under 17.6 lb, the HUANUO arm costs less.
Ultrawides are wider and heavier than standard monitors, so most budget gas-spring arms aren’t rated for them. The Ergotron LX is rated for screens up to 34 inches and 25 lb, flat or curved. Check your monitor’s weight without its stand and its VESA pattern before you buy.
Based on OSHA · Ergotron · HUANUO
Which one should you buy?
HUANUO Single Monitor Arm
13–32 in up to 17.6 lb, clamp or grommet.
- 13–32 in
- Up to 17.6 lb
- Budget
We don't list prices because they change daily; Amazon shows the current price and stock when you click. We earn a commission on purchases, which never decides a pick. How we choose.
The short answer: Ergotron LX for 34-inch ultrawides. HUANUO only if your screen is 32 inches or smaller and within its 17.6 lb limit. Larger ultrawides (38 in and up) need a heavy-duty arm rated for them.
This is a focused guide. For the full category with every pick, read the best monitor arm.
Monitor arms for ultrawides compared
Swipe the table sideways to see both →
| Spec | Best for 34-inch ultrawidesErgotron LX Single Monitor Arm | For 32 inches and underHUANUO Single Monitor Arm |
|---|---|---|
| Screen size | Up to 34 in | 13–32 in |
| Weight range | 7–25 lb | Up to 17.6 lb |
| VESA | 75 / 100 mm | 75 / 100 mm |
| Mount | Clamp or grommet | Clamp or grommet |
| Mechanism | Constant-force | Gas spring |
| Best for | Heavy & ultrawide | Most monitors |
| Price & stock | Check price | Check price |
Why pick Ergotron LX Single Monitor Arm?
The LX is the arm in our guide rated for 34-inch flat or curved screens, with a weight range of 7–25 lb that covers most 34-inch ultrawides without their stands.
Its constant-force mechanism holds a wide, heavy screen steadily, and the long reach helps you push the screen to a comfortable distance. Check that your desk can take the clamp and that the monitor has VESA 75 or 100 mm holes.
Great if you
- Have an ultrawide or heavy monitor
- Want very smooth, stable adjustment
- Want premium build
Skip it if you
- Have a light monitor under 7 lb
- Want the lowest price
- Have a very shallow desk
Key specs
- Screen size
- Up to 34 in, flat or curved
- Weight
- 7–25 lb
- VESA
- 75×75 / 100×100
- Finish
- Polished aluminum
- Model
- 45-241-026
Ergotron LX Single Monitor ArmOpens Amazon; the live price and stock are shown there.
Check price on Amazon Why pick HUANUO Single Monitor Arm?
If your “ultrawide” is actually a 29- or 32-inch model, or a wide 32-inch standard monitor, the HUANUO covers it for less, as long as it weighs 17.6 lb or less without its stand.
Don’t push past its limits: an overloaded gas-spring arm sags and won’t hold its height.
Great if you
- Have a 24–32-inch monitor
- Want to free desk space
- Want both clamp and grommet options
Skip it if you
- Have an ultrawide over 32 in
- Have a very heavy monitor
- Have a desk with a thick lip or crossbar
Key specs
- Screen size
- 13–32 in
- Weight
- Up to 17.6 lb
- VESA
- 75×75 / 100×100
- Mount
- C-clamp and grommet
- Model
- HNCM12
HUANUO Single Monitor ArmOpens Amazon; the live price and stock are shown there.
Check price on Amazon How to check an arm will hold your ultrawide
Find three numbers before you buy: screen size, weight without the stand, and VESA hole spacing. They’re on the spec sheet or a sticker on the back.
Weight without stand
Arms list a weight range. Use the panel weight without its stand, not the boxed weight.
Screen size
Ergotron LX is rated up to 34 in; HUANUO up to 32 in.
VESA
Both need 75×75 or 100×100 mm holes. Some ultrawides need an adapter plate.
Desk
Wide, heavy screens put more leverage on the clamp; use a solid desk and check for lips or crossbars.
Ergotron LX Single Monitor ArmOpens Amazon; the live price and stock are shown there.
Check price on Amazon Ultrawide monitor arm questions
Will a monitor arm hold a 34-inch ultrawide?
Only if it is rated for both the size and the weight. The Ergotron LX is rated for up to 34 inches and 25 lb.
Can I use the HUANUO arm for an ultrawide?
Only for screens up to 32 inches and 17.6 lb. It isn’t rated for 34-inch ultrawides.
What about 38- or 49-inch ultrawides?
They exceed the arms in this guide. Look for a heavy-duty arm rated for the size and weight.
How high should an ultrawide sit?
OSHA recommends the top of the screen at or slightly below eye level, about an arm’s length away.
How we picked
We compared manufacturer weight, size and VESA ratings and OSHA’s workstation guidance, as of October 2026.
We have not hands-on tested these products; we compare published specifications, independent measurements and manufacturer documentation, and we update this page when models change. Read the full methodology.
What sources did we use?
- OSHA: Computer workstations eTool, monitors (accessed October 23, 2026)
- Ergotron: LX desk monitor arm (accessed October 23, 2026)
- HUANUO: official site (accessed October 23, 2026)