Fits Standard Size Screens: Dual mount for monitors 13 to 30 in size and up to 19.8 lbs in weight (each) with 75x75mm or 100x100mm VESA patterns. Secures to desks up to 2.4' thick with heavy-duty C-clamp Tension Arm Mount: Spring-assist arms counterbalance the weight of your monitors for optimal ergonomic height adjustments