Adjustable monitor arm allows you to free up space on your desk and set your monitor at the best ergonomic position with several height options. Move the arm up, down, forward and back. Height adjusts up and down through a 7-1/2" range. Dual-Swivel Monitor Arm can rotate from landscape to portrait. Clamp mount hardware fits desks up to 4-1/4" thick, and grommet mount hardware fits desks up to 2-1/4" thick. Weight capacity is 30 lb. Monitor arm is VESA MID-D compliant.