This Dual Monitor Arm is the perfect solution to free up your desktop. The lower arm is made from sturdy aluminum and the upper arm is made from solid plastic to ensure that your monitors remain stable. This Monitor Arm is designed to accommodate two monitors measuring anywhere between 17 to 27 inches and weighing between 4. 4 and 19. 8 lb each. At the base of the Monitor Arm, you will find two USB 3. 0 ports and 2 audio ports to keep your most important accessories close at hand. The Arm has a 360-degree rotation capability and can tilt up or down to ensure that you place your monitors at the most comfortable position. Also included are the desk clamp and the grommet base to help ease the installation process.