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  • LX Dual Side-By-Side Arm
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LX Dual Side-By-Side Arm

169 customer reviews
| 52 answered questions

List Price: $329.00
Price: $277.53 & FREE Shipping
You Save: $51.47 (16%)
In Stock.
Ships from and sold by BisonOffice.
  • Extends LCDs up to 25" (64 cm) with the adjustment range of 18" (46 cm); push your displays out of the way when not in use.
  • Frees up desktop to increase workspace
  • Easy to use: Simple installation and effortless operation
80 new 2 used from $215.00

High-Quality Monitor Arms from AmazonBasics Starting At $99.99

AmazonBasics Single Monitor Mounting Arm
Easy set up with desk or wall-mount option. Backed by an AmazonBasics Limited 1-Year Warranty. Shop Single Arm or Dual Arm mounts.
$277.53 & FREE Shipping In Stock. Ships from and sold by BisonOffice.

Frequently Bought Together

LX Dual Side-By-Side Arm + LX Desk Mount LCD Arm + Ergotron Notebook Arm Mount Tray
Price for all three: $447.44

These items are shipped from and sold by different sellers.

Buy the selected items together

Product Description

Product Description

Durable polished aluminum construction! . Create a productive side-by-side configuration that lifts screens up to where they are easier to see while reclaiming valuable worksurface.

From the Manufacturer

LX top view
LX Dual Side-by-Side Arm

Providing unparalleled range of motion

Create a productive multi-display workspace that lifts screens to where they’re easier to see while reclaiming valuable worksurface. Reposition your LCDs with just a touch. Up. Down. Forward. Back.


  • Provides dual-display productivity while offering the ultimate in positioning flexibility
  • Durable polished aluminum construction
  • Increase viewing comfort—help reduce eye, back and neck strain
  • Extends displays out up to 25" (64 cm), or folds back over the base into a compact position
  • Easily turn one or both screens from landscape mode to portrait mode—view entire pages without scrolling
  • 13" (33 cm) height range meets or exceeds the ergonomic needs of most users
  • Patented CF motion technology provides effortless display-position adjustment
  • Cable management feature routes cables under the arm, out of the way
  • Passes Ergotron’s 10,000-cycle motion test, which ensures years of trouble-free height adjustment. This means it’s tested to perform 10 times the expected life-cycle of other competitive brands


LCD Size Capacity Lift Tilt Pan Rotation VESA
≤ 24"* 7–20 lbs†
3.1–9.1 kg
33 cm
75°‡ 360° 360° MIS-D

LX for bi-focal viewing
Easily position displays to optimize bi-focal viewing
  • In the box: two LX arms, two extensions, desk clamp and grommet mount base, 3.5" pole, dual-post bracket, monitor attachment hardware
  • * Larger displays (e.g. 23" to 24" screen sizes) cannot be positioned in a stacked orientation; larger displays can only be placed side by side
  • † Extra thick displays may decrease weight capacity. See manufacturer’s web site for details
  • † Maximum individual LCD weight = 7 to 20 lbs (3.1 to 9.1 kg); maximum combined weight = 40 lbs (18.1 kg)
  • ‡ Tilt Range: 70° upward, 5° downward
  • Mounting Standard: VESA FDMI MIS-D, 100/75, C (hole pattern: 100 x 100 mm & 75 x 75 mm)
  • Includes two installation options: Desk clamp attaches to edge up to 2.6" (66 mm) thick; grommet mount attaches through hole .31" to 2" (7–51 mm) wide and up to 3" (80 mm) thick
  • Polished aluminum construction offers greater durability and enhanced aesthetics
Display Mount
Neo-Flex LCD Arm LX Desk Mount LCD Arm MX Desk Mount LCD Arm LX Dual Stacking Arm LX Dual Side-by-Side Arm
45-174-300 45-241-026 45-214-026 45-248-026 45-245-026
Mounting Application Single monitor Single monitor Heavy display Dual monitors Dual monitors
Maximum Screen Size 22" 24" 30" 24" 24"
Weight Range ≤ 18 lbs 7–20 lbs 14–30 lbs 7–20 lbs each 7–20 lbs each
Height Adjustment 8" 13" 5" 13" 13"
Easy-Adjust CF Technology - YES YES YES YES

Product Details

User Manual [1.68mb PDF]
  • Product Dimensions: 20 x 18 x 7 inches ; 16.1 pounds
  • Shipping Weight: 15.5 pounds (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B0036FQ23A
  • Item model number: 45 245 026
  • Average Customer Review: 4.8 out of 5 stars  See all reviews (169 customer reviews)
  • Amazon Best Sellers Rank:
  • Product Warranty: For warranty information about this product, please click here
  • Date first available at October 22, 2009

Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

60 of 62 people found the following review helpful By David L. (My little slice of...) on September 10, 2012
Verified Purchase
I took a crazy flyer, and tried to use this baby with TWO THIRTY INCH MONITORS ! Yes it worked !!

This thing is crazy, and overbuilt ! It is super duper well made and VERY strong, like a tank-

My new dual 30" Dells that went above my dual 5yr old Apple 30"ers, on a shelf mount above the other two, and went in beautifully & solid !

I was worried that the mount wouldn't articulate enough to hold both monitors side by side- I was slightly concerned that the max weight would be too much- Not so ! The width is no problem, and the weight is .5 lbs 'over budget' for each monitor, from the Co. specs-

They are being over cautious, believe me-

You can use this at a million angles, including vertical or whatever angle- This thing is endlessly adaptable !

I couldn't be more happy w/ this mount-

Yes it's pricey, however it is the absolute best-



Two years later update !

By special request I added two pics w/ notes-

These puppies are crazy fantastic (not that they've been moved or anything, haha-)

You could certainly add a slightly larger single monitor w/ a somewhat smaller 2nd one, as was asked in comments-

PS.. Do I get a commission Amazon/Ergotron for helping w/ sales ?
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55 of 57 people found the following review helpful By Gordon on June 25, 2010
I bought this a couple of weeks ago to mount 2 of the 24" SAMSUNG LCDs that I purchased. It works great, it easily accomodates side by side 24" monitors.

The only issue I had is that if your monitor's VESA mounts are in a recessed location like mine were (look at the back of the monitor, look for the 4 holes used to mount the screen), you will have to separately purchase a spacer for about $5. This information is not included in the instructions or product description, I had to email the customer service to find out what to do. This was annoying given the premium price of the product, but it now works flawlessly.

One other minor quibble is that the cable management provided includes those annoying zip ties. Kind of shabby for a high-end mount like this. I bought some velcro cable ties for $5 or so about a week later that do an infinitely better job.

I actually use this side by side mount and a separate mount for a 3rd monitor (the Ergotron dual stacking arm -- not using the 4th arm at the moment). The monitors are in the corner of the room, and have a clean look like they're floating in space when you walk in the room. Very sleek.

In summary, great product, but you may need to purchase a couple other accessories for a few bucks to get the most out of it. Would definitely buy again.
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23 of 24 people found the following review helpful By R. Gillespie on June 28, 2010
Verified Purchase
About a year ago my office was notified we would be moving to a different floor in our office building and would be getting new Steelcase office furniture (cubicles and a chair). At the time I was using two monitors sitting on desk stands that didn't have any adjustment range. One monitor stand was so short I had it sitting on a empty portable camera box to get the the monitor heights about even. The monitors took up a lot of desk space and I had to lean in to read the screens with my computer reading glasses. Our building services and IT folks had no suggestions so I did the reasearch on monitor stands and whether they would fit the new cubical desktops. Fortunately the new furniture had a cable route space gap at the back that would allow the C-Clamp mount to work fine.

After researching all kinds of monitor stands online I found the Ergotron LX dual monitor stand fit my needs just right. The MSRP price was good and the Amazon price was excellent. Free shipping on top of that and we had a deal.

The dual monitor "kit" shipped with excellent packing and instructions and I had no difficulty in assembling it and mounting it to the back of the cubicle desk top.

Since my PC operating position is in one corner of the cube I initially installed the base mount on the left but later moved it to the right side to get a little more left/right angle adjustment to avoid sun glare on my monitors coming in my office windows.

Routing the cables along the articulating arms was easy and I am happy with the installation. At our floors open house where we had visitors looking at how our offices/cubes were layed out, folks were asking what brand and model monitor stand I was using to see about getting their own.
Read more ›
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17 of 18 people found the following review helpful By LuoLong on October 29, 2012
Verified Purchase
I bought the Ergotron LX Dual Side-by-Side Arm (45-245-026) and the Ergotron Notebook Arm Mount Tray to mount my 15-inch MacBook Pro on one arm and my 27-inch Apple Thunderbolt Display on the other arm. The setup works perfectly and the arm holding the 27-inch monitor has yet to move from any set position due to the weight of the monitor. I have a height-adjustable desk so that I can sit and stand throughout the day, so it is not uncommon for me to move the monitor up and down many times, and the monitor just stays put.
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9 of 9 people found the following review helpful By Kim Martin Nehrbass on June 13, 2010
Verified Purchase
Needed to be able to easily adjust the distance of my monitors without cluttering up my desk. It frees up the space below the monitors. This mounting kit really works well and gives you the option to clamp it to the back of your desk or drill a small hole (3/8") and attach it anywhere on your desk. Since I have a 36" wide desk I chose the latter so I could get it closer. Also, you can move each monitor independently. Extremely heavy duty and well made. Well worth the money!
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