Fits 27 to 38 Ultrawides: Dual monitor mount holds two screens up to 38 and 22 lbs each with 75x75mm or 100x100mm VESA patterns. Secure to desk with a heavy-duty C-clamp or optional grommet mount. Max recommended desktop thickness is 3.25 -Patented- Premium Telescoping Arms: Heavy-duty telescoping arms adjust in length to fit the size of your monitors. The arms slide into each other for added strength and stability