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Best Height-Adjustable Monitor Arms in the UK (2026)

Written by Everyday Technology Desk Everyday technology editorial desk · Monitors & Displays beat · reviewed 12/09/2026

Start with your monitor's net weight, VESA pattern and desk thickness. The two Invision picks have exact Amazon UK buying actions; the other exact products remain non-affiliate references for comparison.

Quick answer · Top 4

Compare all four options

Retailer buttons are affiliate links and may earn commission. Official references and product details explain identity, specifications and buying checks; they do not confirm live price, stock or universal fit.

Invision MX400 New Base black dual monitor arms and clamp desk mount (demonstration monitors shown are not included)

Pick 1 - Standard Dual-Screen Adjustment (2–9kg each)

Invision MX400 New Base Dual Monitor Arm

Check price on Amazon

At a glance:Dual-monitor desks with two screens weighing between 2 kg and 9 kg each.

Trade-off:Printed manual diagram G lists 10-90 mm whereas diagram I lists 20-90 mm; conservative 20-90 mm overlap range applies.

Invision MX900 black dual monitor arms, VESA plates and desk clamp base

Pick 2 - Heavier Dual-Screen Adjustment (2–15kg each)

Invision MX900 Dual Monitor Arm

Check price on Amazon

At a glance:Dual monitors weighing 2-15 kg per screen on desks rated for clamp or through-desk loads.

Trade-off:Requires desk structure capable of supporting 2-15 kg per screen.

Everyday Technology Desk: before you choose: Check the exact device, port, app, operating-system and warranty fit before checkout.

Decision checks: device and port fit · portability · support and warranty

Reviewed 12/09/2026 Criteria-based comparison How we chose Review details

The shortlist

Four options, with the trade-offs visible

Use the fit, limitations and checkout checks before opening a retailer page. Confirm the current price, stock, delivery and returns with the retailer.

Invision MX400 New Base black dual monitor arms and clamp desk mount (demonstration monitors shown are not included)

Pick 1

First comparison point

Standard Dual-Screen Adjustment (2–9kg each)

Invision MX400 New Base Dual Monitor Arm

Gas-assisted dual arm for two 19-32 inch screens weighing 2 to 9 kg each, with VESA 75/100 mm and a conservative 20-90 mm desk-mounting range. Check net screen weight and desk support before fitting.

Check lead pick on Amazon

Affiliate retailer link. Check current price, stock, delivery and returns before buying.

Highlights

  • Dual gas-assisted arms support two 19-32 inch screens weighing 2-9 kg each.
  • Independent arm movement with 75 mm and 100 mm VESA compatibility.

Drawbacks

  • Printed manual diagram G lists 10-90 mm whereas diagram I lists 20-90 mm; conservative 20-90 mm overlap range applies.
  • Requires minimum 2 kg screen mass per arm to counterbalance spring tension.

Buyer fit

Best for

  • Dual-monitor desks with two screens weighing between 2 kg and 9 kg each.

Not for you if

  • Monitors under 2 kg or over 9 kg, or desk mounting setups outside 20-90 mm thickness.

Check before buying

  • Weigh each monitor without its factory stand (2-9 kg range) and confirm VESA pattern (75x75 or 100x100 mm).
  • Measure desk thickness (20-90 mm), check desktop manufacturer load guidance, and confirm underside access before fitting.
Invision MX900 black dual monitor arms, VESA plates and desk clamp base

Pick 2

Heavier Dual-Screen Adjustment (2–15kg each)

Invision MX900 Dual Monitor Arm

Gas-assisted option for two 24-35 inch screens weighing 2 to 15 kg each, using a 20-80 mm clamp or 20-90 mm through-desk mount. The heavier supported load increases the importance of desk checks.

Check on Amazon

Affiliate retailer link. Check current price, stock, delivery and returns before buying.

Highlights

  • Supports heavier dual screens from 2 kg to 15 kg per display (24-35 inches).
  • Independent gas-assisted dual arms with VESA 75/100 mm compatibility.

Drawbacks

  • Requires desk structure capable of supporting 2-15 kg per screen.
  • Not suitable for lightweight screens under 2 kg per arm.

Buyer fit

Best for

  • Dual monitors weighing 2-15 kg per screen on desks rated for clamp or through-desk loads.

Not for you if

  • Monitors under 2 kg or over 15 kg, or desk mounting setups outside specified clamp/through-desk limits.

Check before buying

  • Weigh each monitor without stand (2-15 kg range) and confirm VESA pattern (75x75 or 100x100 mm).
  • Verify desk thickness and check desktop manufacturer suitability guidance and instructions prior to installation.
Fellowes Platinum Series Dual Monitor Arm 8042501 black dual arms and desk clamp with demonstration screens (monitors not included)

Pick 3

Lighter-Screen Adjustment (1.5–8kg each)

Fellowes Platinum Series Dual Monitor Arm 8042501 Black

Gas-assisted dual arm for lighter screens from 1.5 to 8 kg each with VESA 75/100 mm. We use the official dimension sheet's conservative 32 inch ceiling because the manual text conflicts.

Highlights

  • Gas counterbalance supports lighter monitors from 1.5 kg to 8 kg per display.
  • Dual clamp position brackets cover 10-55 mm and 50-85 mm desk thicknesses.

Drawbacks

  • Manual page 2 states 40 inches while dimension sheet specifies 32 inches; conservative 32 inch ceiling is recorded.
  • Requires securing arm to desk before mounting displays.

Buyer fit

Best for

  • Lighter dual-monitor setups (1.5-8 kg per screen).

Not for you if

  • Monitors over 8 kg or screens under 1.5 kg, or unverified USB pass-through expectations.

Check before buying

  • Weigh each monitor without stand (1.5-8 kg range) and confirm VESA pattern (75x75 or 100x100 mm).
  • Confirm supplied revision, measure desk thickness (10-55 / 50-85 mm clamp, 10-85 mm grommet), and check underside clearance.
StarTech ARMDUAL2 black fixed-pole articulating dual monitor mount attached to demonstration desktop (demonstration desk shown for illustration, monitors not included)

Pick 4

Set-and-Adjust Fixed-Pole Reference

StarTech ARMDUAL2 Fixed-Pole Articulating Dual Monitor Arm

Fixed-pole articulating comparison for two screens up to 8 kg each. Height changes require manual collar adjustment, so choose it only when occasional rather than fluid height changes suit the desk.

Highlights

  • Fixed-pole set-and-adjust dual mount for two screens up to 8 kg each.
  • Wide clamp mounting range (10-88 mm) fits various desk thicknesses.

Drawbacks

  • Requires manual collar adjustment on pole to change vertical height.
  • Minimum screen weight is not specified by manufacturer.

Buyer fit

Best for

  • Set-and-adjust dual-monitor arrangements where frequent height adjustments are not needed.

Not for you if

  • Monitors over 8 kg or setups requiring instant fluid vertical height adjustment.

Check before buying

  • Verify screen weight is 8 kg or under per monitor without stand and VESA pattern is 75x75 or 100x100 mm.
  • Confirm required height and reach with seller/manufacturer, measure desk thickness (10-88 mm clamp, 10-75 mm grommet), and check underside clearance.

Top 4 comparison

Compare the useful differences, trade-offs and final checks side by side.

Before you compare

Check these first

  1. 1Weigh each monitor without its stand and match both minimum and maximum limits.
  2. 2Confirm VESA pattern, total screen width and clearance through the intended movement range.
  3. 3Measure desktop thickness and inspect underside access, edge shape and manufacturer load guidance.

Your four roles

1
Standard Dual-Screen Adjustment (2–9kg each)Invision MX400 New Base Dual Monitor ArmDual-monitor desks with two screens weighing between 2 kg and 9 kg each.
Check current price
View specs & trade-offs

Trade-off:Printed manual diagram G lists 10-90 mm whereas diagram I lists 20-90 mm; conservative 20-90 mm overlap range applies.

Not ideal for:Monitors under 2 kg or over 9 kg, or desk mounting setups outside 20-90 mm thickness.

Check:Weigh each monitor without its factory stand (2-9 kg range) and confirm VESA pattern (75x75 or 100x100 mm).

Sources:Official product page: https://www.invisiontechnology.co.uk/monitor-arm-mx400.

2
Heavier Dual-Screen Adjustment (2–15kg each)Invision MX900 Dual Monitor ArmDual monitors weighing 2-15 kg per screen on desks rated for clamp or through-desk loads.
Check retailer price
View specs & trade-offs

Trade-off:Requires desk structure capable of supporting 2-15 kg per screen.

Not ideal for:Monitors under 2 kg or over 15 kg, or desk mounting setups outside specified clamp/through-desk limits.

Check:Weigh each monitor without stand (2-15 kg range) and confirm VESA pattern (75x75 or 100x100 mm).

Sources:Official product page: https://www.invisiontechnology.co.uk/monitor-arm-mx900.

3
Lighter-Screen Adjustment (1.5–8kg each)Fellowes Platinum Series Dual Monitor Arm 8042501 BlackLighter dual-monitor setups (1.5-8 kg per screen).
View specs & trade-offs

Trade-off:Manual page 2 states 40 inches while dimension sheet specifies 32 inches; conservative 32 inch ceiling is recorded.

Not ideal for:Monitors over 8 kg or screens under 1.5 kg, or unverified USB pass-through expectations.

Check:Weigh each monitor without stand (1.5-8 kg range) and confirm VESA pattern (75x75 or 100x100 mm).

Sources:Official resources index binding MPN 8042501: https://www.fellowes.com/uk/en/catalog/workspace-ergonomics/resources/pg/downloads.

4
Set-and-Adjust Fixed-Pole ReferenceStarTech ARMDUAL2 Fixed-Pole Articulating Dual Monitor ArmSet-and-adjust dual-monitor arrangements where frequent height adjustments are not needed.
View specs & trade-offs

Trade-off:Requires manual collar adjustment on pole to change vertical height.

Not ideal for:Monitors over 8 kg or setups requiring instant fluid vertical height adjustment.

Check:Verify screen weight is 8 kg or under per monitor without stand and VESA pattern is 75x75 or 100x100 mm.

Sources:Official product datasheet: https://media.startech.com/cms/pdfs/armdual2_datasheet.pdf (SHA256: cd8a87bef1447d455bced01976c6aa2f5340afecd2827357c81fdacfe547a2de).

Choose this if / Avoid this if

Rule out poor-fit options before comparing finer details.

Avoid if

  • Skip a gas-assisted arm if the monitor is below its stated minimum or above its maximum weight without the factory stand.
  • Skip clamp or grommet mounting if the desk maker does not support the concentrated load or underside access is blocked.
  • Skip this guide if you need a universal-fit, installation or long-term durability guarantee.

Dealbreakers

  • The current seller page does not show the exact model or ASIN recorded here.
  • Your monitor is outside the stated weight or VESA limits.
  • Your desk thickness, construction or rear clearance does not meet the supplied instructions.

Check before buying

  • Weigh each monitor without its stand and match both minimum and maximum limits.
  • Confirm VESA pattern, total screen width and clearance through the intended movement range.
  • Measure desktop thickness and inspect underside access, edge shape and manufacturer load guidance.

Choose another shortlist if

  • You need a single-monitor or ultrawide-specific mount.
  • Your desk requires a freestanding solution.
  • Frequent height adjustment is essential but only a fixed-pole option fits the setup.

Detailed buyer guidance

Choose by the monitor and desk you already own, not by a generic “best” claim. Net screen weight determines whether a gas spring can counterbalance correctly, while desk construction and underside access determine whether the mount can be installed as documented.

Why MX400 is the starting point

The Invision MX400 New Base covers two 19-32 inch screens weighing 2-9 kg each, with independent gas-assisted arms and VESA 75/100 mm mounting. Its manual contains two through-desk thickness figures, so this shortlist applies the conservative shared 20-90 mm range. The exact Amazon UK ASIN was checked on 12 September 2026; re-check seller, condition, delivery and returns before paying.

When another pick fits better

  • Choose MX900 for two heavier 24-35 inch screens within 2-15 kg each, after confirming the desk can carry the greater combined load.
  • Use the Fellowes 8042501 reference when either screen is between 1.5 and 2 kg; apply its conservative 32 inch ceiling.
  • Use StarTech ARMDUAL2 only when a fixed-pole, manually set height is acceptable.

Installation checks that matter

Remove each factory stand before weighing. Match VESA 75x75 or 100x100 mm, measure desk thickness at the actual mounting point, inspect underside obstructions and follow the supplied instructions. A compatible measurement does not itself prove the desktop material can safely accept the load.

Buying-action boundary

The MX400 and MX900 Amazon UK links are the only commission-paying buying actions in this cohort. Fellowes and StarTech links are exact non-affiliate references for checking product identity and documentation; they are not presented as purchase calls to action.

When another role fits better

The first option is a useful starting point, not a universal winner. Move another role ahead when its use case, fit or ownership trade-offs match you better.

Known limitations

UK Shortlists has not hands-on tested these arms; recommendations use documented specifications and explicit installation caveats.

How we chose

The checks behind the four picks

We compared documented adjustment mechanisms, per-screen weight limits, VESA fit and desk mounting constraints without using live price, rating or universal-fit claims.

  • Step 1: Adjustment mechanism and whether height changes are fluid or set-and-adjust
  • Step 2: Net per-screen weight and VESA 75x75/100x100 mm compatibility
  • Step 3: Clamp or through-desk thickness, underside access and desk load suitability
  • Step 4: Exact model identity, official documentation and approved manufacturer imagery
  • Step 5: Documented adjustment trade-offs that distinguish each exact model

Disclosure

Last reviewed: 12/09/2026

UK Shortlists may earn a commission when you use some retailer links. This does not increase the price you pay.

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Who checked this shortlist?

Written / compiled by:
Everyday Technology Desk
Last reviewed:
12/09/2026
Review basis:
Criteria-based comparison

We compare published product information, retailer details and the buying criteria shown above. UK Shortlists does not currently publish claims based on first-party product use, laboratory testing or long-term testing.

FAQs & alternatives

Which option suits lighter monitors?

Fellowes documents a 1.5 kg lower limit per screen, while the two Invision gas arms start at 2 kg. Verify weight without the original stand.

Why is the fixed-pole StarTech arm included?

It is a useful set-and-adjust comparison, but it does not provide the same fluid vertical movement as a gas-assisted arm.

Are all four product links commission-paying?

No. Only the two clearly labelled Amazon UK buying actions are affiliate links. StarTech and Fellowes are retained as non-affiliate exact source references, not purchase buttons.

Also consider

  • Use two independent single arms when the monitors have very different weights or need wide separation.
  • Keep the original stands if the desk cannot safely take a concentrated clamp load.
  • Defer purchase if the current listing does not confirm the exact model and included mounting hardware.

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