Mount-It Height Adjustable Dual Arm Computer Desk Mount Stand Innovative desktop PC monitor desk riser that mounts Samsung, Acer, Viewsonic, LG, Dell, HP, Asus, AOC, eMachines flat panel LCD and LED displays from 13" to 27" (13, 15, 17, 19, 20, 22, 23, 24 and 27 inch monitors). Compatible with VESA 75 (75 x75 mm) and VESA 100 (100 x 100mm). VESA pattern is the square bolt hole pattern behind the monitor and measures typically 3 inch by 3 inch or 4 inch by 4 inch. Dual gas spring arms are height adjustable to 13.5 inches between lowest and highest position of the arm. Gas springs offer adjustable counterbalance to the weight of the monitor, making it incredibly ease to change monitor height with the touch of a finger. Built-in spring gauge can be adjusted to suit various monitor weight. The dual arms can also slide up and down on the pole. Pole measures 13.5 inches. Improve the ergonomics of your office workstation and reduce neck, shoulder and back pain by raising to monitors to an ergonomic height on your desktop, depending on your sitting position. 360 degree articulating arms give you the freedom to turn the monitors to another person to share your screen. Heavy-duty design supports up to 19.8 lbs per monitor. The modular base design comes with a combination C-clamp and Grommet Clamp Base. This multi-monitor stand can be mounted on tables up to 3.5 inches thick. Arms come with clips for cable management. Depending on the user and desk height, this mounting bracket can be used for sit-stand desk applications. Made from polished aluminum die-cast and solid steel for durability, heavy-duty function and sleek look. Full motion capability; height adjustment through spring arms, swivel/articulating at each arm connection, tilt and rotate at the monitor holder. You can change monitor orientation from landscape (horizontal) to portrait (vertical) format in seconds without removing the screens.