1.Easy to use,free space,more efficiency health work style, comfort to relieve eye neck and strain . 2.Available in three calibrations to accommodate monitors weighing 4.4 - 8.8lbs , 8.9 - 20lbs , 20 - 33 lbs 3.Material is by High quality Aluminum 4.Built-in cable clips 360 degree swivel 21" extension 5.VESA 75mm or VESA 100mm compatible 6.Accommodates monitors 18" - 28" 7.Integral cable management neatly stores cables 8.Available Mounting Options: C - Clamp, Grommet, Wall, Other