Can it hold an ultrawide monitor?

That wouldn't be very practical. I've got a 32" hooked up and with the arm fully extended there's still barely enough stand-off from the center mounting post.

Questions & Answers: VIVO Dual Monitor Mechanical Spring Sit-Stand Desk Mount for 2 Screens up to 32"

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VIVO Dual Monitor Mechanical Spring Sit-Stand Desk Mount for 2 Screens up to 32"

Fits 17" to 32" Screens: Compatible with most computer monitors 17" to 32" in size and 4.4 lbs to 19.8 lbs in weight (each) with VESA 75x75mm or 100x100mm mounting holes
Articulation and Height Adjustment: Flexible arms offer smooth tilt, swivel, and full rotation for comfortable viewing angles. Dual mechanical springs provide smooth height transitions by perfectly counterbalancing the weight of your monitors
Drill-Free Mounting: This product secures to your surface of choice up to 3.3" thick via a heavy-duty C-clamp, or use the equally sturdy optional grommet mount to suit your preferred layout
Sturdy Steel and Aluminum Support: Securely holds two monitor screens weighing up to 19.8 lbs each. Tension can be increased for heavier monitors or decreased for lighter monitors to achieve more flexibility

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