Best Dual Monitor Arms in the UK (2026)

This shortlist is designed for UK buyers comparing dual monitor arms for two-screen desktop setups. It maps exact per-screen weight capacities, mounting dimensions and height adjustment trade-offs without using live price, stock, rating or universal-compatibility claims.

Why the winner wins (evidence basis)

The Invision MX400 New Base is the default recommendation for standard dual-monitor setups because it handles two popular 19 to 32 inch displays weighing between 2 kg and 9 kg per screen using gas-assisted counterbalance. Its mounting hardware fits desk thicknesses from 20 mm to 90 mm for both clamp and grommet through-desk setups, offering a practical balance for typical office monitors for standard desktop setups.

Key setup checks before buying

• Per-screen mass without stand: Weigh each monitor after removing its factory desktop stand. Gas-spring counterbalance arms require monitors to stay within both minimum and maximum weight bounds. If a screen is below the minimum (e.g. under 2 kg on gas models), stay within manufacturer weight limits.
• VESA & screen clearance: Confirm both monitors feature 75x75 mm or 100x100 mm VESA screw hole patterns. Measure total screen width to ensure two monitors mounted side-by-side fit comfortably within the arm’s maximum articulation span.
• Desk thickness & underside access: Measure desktop thickness (including any front or rear bevels), check desktop manufacturer load support recommendations, and inspect the underside for structural beams, drawers, or privacy lips that might block C-clamp tightening plates.
• Fixed pole vs gas counterbalance: Gas-assisted arms allow flexible height adjustments. Fixed-pole arms require manually loosening a collar on the central pole to adjust height, making them best suited for set-and-adjust arrangements.
• When single arms or original stands fit better: If your two monitors differ drastically in size or weight, or if you need to position them far apart across a wide desk, using two individual single monitor arms often provides superior positioning flexibility. If your desktop construction or underside access is unsuited for clamp loads, retaining original factory stands remains a practical option.

Product demonstration imagery notice

Product photographs showing demonstration monitors or desks are provided solely to illustrate arm mounting geometry. Demonstration monitors and desks depicted in images are not included with the product.

Who should choose which option

Default Standard Baseline: Invision MX400 New Base

Select the Invision MX400 New Base if you have two standard office or gaming monitors weighing between 2 kg and 9 kg per screen. It features independent gas spring arms and accommodates desk thicknesses from 20 mm to 90 mm.

• Manufacturer documentation note: Printed manual version 2025.1 contains conflicting through-desk thickness statements (Diagram G states 10–90 mm whereas Diagram I states 20–90 mm). UK Shortlists records a conservative 20–90 mm overlap range; confirm with the manufacturer or seller if your desk falls outside this range.

Heavy-Screen Option: Invision MX900

Select the Invision MX900 if your monitors are heavier (2 kg to 15 kg per screen, 24 to 35 inches per display).

• Mounting requirements: Check desktop manufacturer load guidance for clamp (20–80 mm) or through-desk (20–90 mm) mounting. Through-desk installation instructions specify drilling a 10 mm hole positioned at least 40 mm from the rear desktop edge to ensure full base clamp contact; follow supplied manufacturer instructions.

Set-and-Adjust Fixed Pole Option: StarTech ARMDUAL2

Select the StarTech ARMDUAL2 if you prefer a fixed-pole articulating setup for screens up to 8 kg each (max 32 inches) and do not need to alter monitor height frequently.

• Mounting & adjustment: Clamps onto desks 10 mm to 88 mm thick or grommet-mounts through 10–75 mm desks. Height is set manually along a central steel pole, with jointed arms providing horizontal articulation.
• Documentation note: Confirm your required height and reach with the seller or manufacturer prior to installation.

Lighter-Screen Option: Fellowes Platinum Series Dual 8042501 Black

Select the Fellowes Platinum Series Dual (8042501 Black) if you have lighter monitors down to 1.5 kg (up to 8 kg per screen) that fall below the 2 kg minimum threshold of other gas arms.

• Mounting & size ceiling: Includes dual clamp bracket positions covering 10–55 mm and 50–85 mm desk thicknesses, or grommet mounting (10–85 mm).
• Manufacturer documentation note: Manual text claims 40-inch monitor compatibility, but official manufacturer dimension sheets specify a 32-inch maximum screen size. UK Shortlists records a conservative 32-inch screen ceiling; confirm exact supplied hardware revision before purchase.

What would change the recommendation

Recommendations would change if manufacturer specifications alter per-screen weight capacities, VESA hole standards, or clamp thickness limits. Changes to desktop construction standards or availability of exact model documentation would also prompt an update.

Known limitations

• No universal fit guarantee: No monitor arm fits every desk or monitor combination. Check monitor weight, VESA pattern, desktop load support, and desk lip access before buying.
• No price or stock claims: Live prices, stock levels, and merchant delivery promises change frequently and are omitted from this decision guide. Re-check current seller terms prior to checkout.