![Heavy Duty Extension Arm [Accessory Only - Requires MA20P-S Single Monitor Arm for Use] Dual 49" Vertical Stacked Monitor Mount Height Adjustable - 100x100 VESA Mount, Black, MA20P-A](https://m.media-amazon.com/images/I/71lZYn9U3BL.jpg)







🖥️ Elevate your workspace, stack your success.
The ULTRARM Heavy Duty Extension Arm (MA20P-A) is a premium accessory designed to expand your MA20P-S single monitor arm into a dual vertical stacked mount. Supporting ultrawide monitors up to 49" and 44 lbs each, it offers 13 inches of smooth height adjustment, 180° swivel and rotation, and +25°/-25° tilt for ultimate ergonomic flexibility. Featuring quick-release VESA compatibility and integrated cable management, this robust black extension arm transforms your desk into a sleek, space-saving powerhouse. Note: Mounting base and pole sold separately.


































| ASIN | B0CL8R3618 |
| Best Sellers Rank | #80 in Computer Monitor Arms |
| Brand Name | ULTRARM |
| Color Name | Black |
| Customer Reviews | 4.5 4.5 out of 5 stars (561) |
| Date First Available | December 18, 2023 |
| Item Weight | 7.96 pounds |
| Item model number | MA20P-A |
| Product Dimensions | 25 x 3 x 15 inches |
S**E
Worth the price
Great monitor mount. Held a G9 Odyssey OLED with no issues. There is no swivel support, but this is an excellent arm for the price. No sag and mounting it to the desk and arm is simple.
T**Z
Great arm, full support, amazing cable management
Super reliable, it is heave but sturdy, it gives you that feeling of security that your monitor won't fall off, I'm currently using a 49'' and I can rest assured that it won't go any where. On top of that the ability to hold more than one monitor is really desirable, really a space saver with a lot of cable management included in it. Something to notice is that this arm does not includes a vesa adapter to connect with the Samsung Odyssey G9 for example, that will have to be purchased separated
K**S
Very sturdy and versatile
This seems like an excellent product. It’s strong enough to easily handle my 42-pound ultrawide monitor, and all the parts seem to be of sturdy construction while still looking somewhat sleek. After tinkering for a minute or so with the tension settings, it is very easy to adjust the monitor’s position. I particularly like that the arm connects to your desk with two separate clamps rather than just one, which seems to provide a very stable attachment. I’m not currently using this feature, but you can apparently attach up to three arms to the base if you have a multiple monitor situation (but not to exceed the stated 50-pound total weight limit).
F**O
Great mount for big boys
Well, this big boy holds my 49 LG like a champ. I even have it without the middle section since I am not using it to rotate or changing positions. I only grab this mount to replace the oem legs of the monitor that takes too much space on my desk. It is really sturdy and very stable. It was very easy to install and save me lots of space. Great deal on the price since all other brands for this 49+ are over $280. Took me like a week of searching and reviewing other brands but finally I've got what I was looking for.
S**A
Nice addition
Great monitor arm, I use it for my monitor that is tiled 90 degrees. Took some time to get everyting tightened up, make sure it fits overr your existing monitor stand. Definetly nice having everything off of the desk.
G**.
Strong and well designed
The ULTRARM Heavy Duty Extension Arm is a robust and well-engineered accessory designed to complement the MA20P-S Single Monitor Arm. It’s perfect for anyone looking to stack dual 49-inch monitors vertically while maintaining adjustability and stability. Pros: Heavy-Duty Build: The extension arm is built to support large monitors securely, with no noticeable wobbling or sagging, even with heavier setups. Height Adjustability: The height adjustment feature works smoothly, allowing you to customize the position for an ergonomic viewing experience. Compatibility: Designed specifically for the MA20P-S arm, it integrates seamlessly and supports VESA 100x100 mounting standards. Clean Design: The black finish looks sleek and professional, fitting well in any office or gaming setup. Space-Saving Solution: Vertical stacking frees up desk space while providing an immersive multi-monitor experience. Cons: Accessory Only: This extension arm cannot be used on its own and requires the MA20P-S Single Monitor Arm, which might limit its appeal to first-time buyers. Assembly: Installation can be a bit challenging, especially for larger monitors, and might require a second pair of hands. Overall Verdict The ULTRARM Heavy Duty Extension Arm is an excellent accessory for those who need a vertical dual-monitor setup. Its sturdy design and adjustability make it a great investment for professionals or gamers seeking a reliable and space-efficient mounting solution. Rating: 4.5/5 Highly recommended if you already own the MA20P-S monitor arm and want to elevate your workspace with a durable and stylish extension arm.
D**K
Actually Good Monitor Arm
Finally, a heavy duty monitor arm that *actually* holds up and fits as much weight as it advertises. This thing is top-notch. For the price, I expected this level of quality but was still surprised. I will definitely be coming back when it's time to add another arm!
A**R
Can't hold what it claims.
Really worried for my monitor got the Samsung g9 neo 57'' and the arm can't hold the monitors weight up it just moves it down right away. I have to have the arm rest on the other section of the arm to keep it up and I can't adjust where it goes
J**O
Great product. I purchased one for my two Samsung Odysseys ultra-wide monitors, at first I thought the VESA plate is causing the monitors to tilt downward, (The VESA plates are too large at the top as the monitors have a rounded back area and the VESA Plates should fit inside the circular recess, I guess) but I noticed I was still learning how to adjust movements. Overall great quality and functionality, my space looks clean and saves desk space.
S**B
Very happy. Bought another after I made sure it met my expectations. Very nice product and easy to use. Could be maybe a bit more buttery smooth in terms of minor adjustments but for the price it’s amazing.
C**N
Works very well. Need to push very hard the screws but once it's done it hold up very well
R**X
It feels really sturdy and secure, and once adjusted properly, it moves smoothly without feeling loose or drooping on its own. You can easily reposition your monitor and it will stay in place very well. It's expensive, but very much worth the money, as it definitely feels like it could easily hold a very heavy monitor without you worrying about it falling off. I have total confidence in this arm, unlike some others I have used. There was, unfortunately, a missing piece in the unit I bought, but there was a card included in the box with a customer support email that they specifically recommend contacting if you have any missing pieces. I sent them an email and they very quickly arranged to send me the missing part with tracked shipping at no charge. Excellent customer service for an excellent product.
G**A
Come da titolo, questo braccio per monitor è qualcosa che vale 10 ⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐ Ero alla ricerca di un braccio per sostenere il mio enorme Samsung Neo G9 da 57". Le prime opzioni che avevo valutato erano però troppo costose. Spendere 300/400€ per un Ergotron mi sembrava veramente troppo. Ed ero quasi rassegnato ad usare la troppo ingombrante base del Neo G9. Dopo lunghe ricerche mi sono però imbattutto in questo ULTRARM di cui ho letto molto bene in giro. Ebbene, mai acquisto fu così azzeccato! Tiene perfettamente l'enorme Neo G9, non solo, dopo aver fatto tutte le regolazioni del caso il monitor non balla neanche se sbatti sulla scrivania. Mentre è possibile eseguire tutti i movimenti con il minimo sforzo. Per quanto riguarda l'installazione, non è semplicissima, bisogna studiare un po' le istruzioni che comunque sono chiare e precise. Una volta capito come proseguire però, il montaggio avviene in una ventina di minuti. Dentro la confezione sono presenti tutti gli attrezzi necessari a stringere le viti e completare il montaggio senza ricorrere ad ulteriori attrezzi. Un cacciavite ed un avvitatore semplificano comunque il tutto. Una tirata di orecchi a Samsung, che mi ha fatto tirare giù tutti i santi dell'anno 2026. Ma come si fa a mettere un adattatore VESA per bracci e NON METTERE le viti per aggancialo? MALEDETTI! Per fortuna questo ULTRARM è dotato di un set di viti di diverse dimensioni che mi hanno permesso di montare il tutto senza problemi. Lo consiglio? Sicuramente si, costa 1/3 di quelli rinomati (e.g. Ergotron o simili) e fa il suo sporco lavoro alla perfezione!
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