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Bright white dual monitor arm stack on tall pole with grey accents and cable management

Ergotron

Ergotron 45-509-216 LX Dual Stacking Arm Tall Pole Bright White cable management

SKU CH-JMWA-0GHV4 MPN 45-509-216

A bright-white dual monitor arm stack with 22-inch tall pole, desk clamp and grommet mount, supporting two 40-inch screens up to 40 lb total

  • ColorWhite
  • Supports two monitors up to 40 lb total
  • VESA 75 x 75 and 100 x 100 compatible
  • 22-inch tall pole for elevated dual-screen stacking
  • Bright white finish with grey accents
  • 10-year limited warranty included

Dual monitor arm for two displays

The Ergotron LX Dual Stacking Arm Tall Pole in bright white supports two monitors up to 40 inches each with a combined load capacity of 40 lb. It uses the VESA 75 x 75 and 100 x 100 mounting standards. The package includes two LX arms with extensions, a 22-inch pole, a heavy-duty two-piece desk clamp with dual screws, two pole collars, two caps, a grommet mount plate and hardware. It is suited for users who need to stack two screens vertically on a single desk mount.

Ten-year warranty and fixed dimensions

The unit stands 7.1 inches high, spans 17.7 inches wide and extends 30.3 inches deep, weighing approximately 19 lb. No moving fans, pumps or electronic components are present, so the product produces no operational noise and draws no power. The ten-year limited warranty covers the monitor mounting hardware supplied in the box. Buyers who need active cooling or powered USB hubs will not find those features here.

Desk mounting options and clearance needs

Installation requires a desk thick enough for the supplied two-piece clamp or a grommet hole for the alternative mount plate. The 22-inch tall pole sets the maximum stacked height, so verify that overhead shelves or cabinets allow sufficient clearance. The arms free up the desk surface beneath the monitors for keyboards, documents or other peripherals. Builders who need a side-by-side array instead of a vertical stack, or who require a shorter pole for low ceilings, should consider a different configuration.

Highlights

  • Supports two monitors up to 40 lb total
  • VESA 75 x 75 and 100 x 100 compatible
  • 22-inch tall pole for elevated dual-screen stacking
  • Bright white finish with grey accents
  • 10-year limited warranty included

Specifications

BrandERGOTRON
ColorWhite
Shipping weight10.43 kg
Package size1524 × 451 × 178 mm

Questions about this item

How do I install the 22-inch pole and heavy-duty desk clamp without stripping the dual screws?

Insert the pole fully into the clamp base, then tighten both screws evenly by alternating turns until the base sits flush on the desk surface.

Which parts of the dual-arm assembly will need replacement after years of daily height adjustments?

The pole collars and pivot bushings inside each LX arm are the wear items; keep the original monitor mounting hardware for future screen swaps.

At what combined monitor weight will the 40 lb capacity limit be reached during constant repositioning?

The 40 lb maximum load applies to both screens together; exceeding it causes the gas springs to sag and the pole to flex.

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