This dual monitor stand will hold monitors up to 28 inches. Arm has a fixed arched to allow outside monitors to be tilted in Clamps to desk. Installs on horizontal surfaces up to 3.5 in. thick VESA 100 x 100 or 75 x 75 compatible Monitors slide across the arm to accommodate all different size monitors Screens can be tilted up, down, left, or right Screens can be rotated from landscape to portrait on the fly. ( no tools required when you want to move the monitors.) Includes screws to attach most monitors Monitors max weight 18lbs Pole height 18″. Arm Length 30″, Pole Diameter 2″