PREMIUM ALUMINUM CONSTRUCTION - Provides excellent support for one monitor screen weighing up to 17.6 lbs, and the built-in elbow spring gauge allows perfect weight adjustment at any level. Maximum screen height to the center of the screen is 17.5’. FULLY ADJUSTABLE - Mechanical spring arm offers an exceptional range of flexible motion featuring -90° to +90° tilt, 180° swivel, 180° rotation, and 10" of smooth height adjustment with mechanical spring lift. MOUNTING OPTIONS - The sturdy desk clamp installs from the top side of your desk for easy setup, and an equally secure grommet mount is provided to accommodate a variety of desk layouts. Recommended desktop thickness ranges from 0.39" to 2".