Ergotron LX Dual Stacking Arm

Durable polished aluminum construction! Use this ingenious tool with your notebook and an external LCD or with two LCDs.
Create a productive multi-display configuration that lifts screens up to where they’re easier to see while reclaiming valuable worksurface.
Suitable for 12"-24" displays 

Benefits
Versatile: Use with a notebook and LCD or with two LCDs
Extends LCDs or laptop up to 25" (64 cm) with an adjustment range of 18" (46 cm); push your displays out of the way when not in use
Frees up the desktop to increase workspace
Easy to use: Simple installation and effortless operation
Experience productivity gains. Check out our Multi-Display Payback Calculator—determine the cost benefit associated with adding a second display
Passes Ergotron’s 10,000-cycle motion test, which ensures a minimum of five years trouble-free height adjustment

Includes two (2) LCD arms and extensions, pole, desk clamp and grommet mount, one (1) notebook tray, notebook fastening kit (you choose: Velcro, non-slip pad or clips)

Features
Polished aluminum construction offers greater durability and enhanced aesthetics
Snap-fit cap secures interface of arms to extensions for greater stability
New clamp and grommet mount base ensures greater stability of display and arm
* Weight Capacity: Maximum individual LCD weight = 7 to 20 lbs (3.1 to 9.1 kg); notebook weight range = 2.5–12 lbs (1.1–5.4 kg); maximum combined weight = 40 lbs (18.1 kg). Monitor depth may affect weight capacity.
Mounting Standards: VESA FDMI MIS-D, 100/75, C (hole pattern: 100 x 100 mm & 75 x 75 mm)
Desk clamp attaches to edge up to 2.6" (66 mm) thick; grommet mount attaches through hole 5/16" to 2" (7–51 mm) wide and up to 3" (80 mm) thick