Humanscale M/Flex Monitor Arm - Three Monitor Solution

Work with a highly modular design allows for easy monitor expansion without sacrificing stability with the Humanscale M/Flex Monitor Arm

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Secure your screens and enjoy more desk space with the Humanscale M/Flex Monitor Arm - Three Monitor Solution.

You'll have all of your monitors at much more productive viewing heights in no time, while keeping the freedom to expand to up to six monitors if you need to add more in the future. Each arm holds screens up to 20 pounds. 

Get ready for configurable ergonomics for monitors that's made surprisingly simple thanks to Humanscale.


  • Highly modular design allows for easy monitor expansion without sacrificing stability
  • Stackable post supports up to six displays (weighing 20 lb each) with a total weight of 120 lb
  • Arms allow for custom configurations using Humanscale's M2.1 and M8.1 monitor arm technology
  • Compact design lets you maximize usable desk space
  • Available in modern polished aluminum with white trim, silver with gray trim, and black
  • Clamp, bolt-through, c:scape, slatwall, hardwall, and combination clamp/bolt-through bases available


Monitor arm style Available as M2.1 or M8.1
Weight capacity M2.1 bracket: 20 lb
M8.1 bracket: 42 lb
Post supports up to 120 lb total
VESA plate 75 mm and 100 mm
(larger plates are available)
Frame finish Available in silver, black or polished aluminum
Warranty 15 years




Arm Type

M2.1 Monitor Arm

The M2.1 Monitor Arm has a simple design with fewer moving parts than the average monitor arm. Fewer parts mean there is less likelihood of wear and tear or breakdown. Additionally, the dynamic M2.1 M/Flex utilizes a mechanical spring rather than a gas or hydraulic mechanism, reducing chance of failure.

M2.1 Monitor Arm straight-straight

M8.1 Monitor Arm

The M8.1 Monitor Arm should be the choice for users who need a heavier-duty solution. No monitor arm on the market can match the high weight capacity of the M8.1 M/Flex. Its dynamic arms support monitors up to 40 lb; its straight arms support monitors up to 60 lb.

M8.1 Monitor Arm straight-straight


The Humanscale M/Flex Monitor Arm is available in three modern finishes. Select from polished aluminum with white trim, silver with gray trim, or black with black trim.



The Humanscale M/Flex Monitor Arm is designed to mount to a multitude of surfaces. Clamp, bolt-through, slatwall, c:scape and direct wall mounts are available. A combination clamp and bolt-through mount is also available.

Humanscale MFlex monitor arm clamp mountHumanscale MFlex monitor arm bolt mount

Post Height

12'' and 18'' high posts are available for the Humanscale M/Flex Monitor Arm, allowing for additional height adjustment along the post if desired.


End Style

The Humanscale M/Flex End Style is available in standard monitor tilt or slider for single monitor.


VESA Plate

Monitors attach directly to the Humanscale M/Flex Monitor Arm with a VESA plate adapter. Most monitors come with a standard 100 mm x 100 mm VESA adapter, but larger or older monitors may have different sizes. Please check with your monitor's manufacturer if you are unsure what size plate your display requires.

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Warranty Policy

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Return Policy

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Ships Free (US 48)
Ships in 3-4 weeks

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