VIVO Aluminum Pneumatic Arm: Premium counterbalance desk mount from VIVO features a quick-release arm and base for simple installation and powerful pneumatic spring lift Ultrawide Compatibility: Holds 17 to 40 monitors weighing 2.2 lbs to 32.5 lbs, including ultra-wide screens. The removable VESA bracket supports 75x75mm and 100x100mm mounting patterns