SINGLE MONITOR ARM: Fits one computer screen sizes 19 20 21 22 23 24 25 26 27 28 29 30 31 32 inches, with a maximum support weight of 22 pounds, using the 75x75mm or 100x100mm VESA square bolt hole pattern found on the back of the monitors. (measure distance, in millimeters, between bolt hole patterns if unsure of size) FEATURES: VESA monitor stand is height adjustable and can be raised up to 15.5" inches and comes with cable management clips. Quick-release, detachable VESA plate comes off with a press of a button and makes monitor mounting a breeze. Cold-rolled steel construction is heavy duty and will stand the test of time. Comes with interchangeable C-clamp and grommet base mount for use on desktops.