https://www.jxjmly.com/product/lcd-monitor-arm/single-lcd-monitor-arm-with-gas-spring-fully.html 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 weighing4.4- 8.8lbs , 8.9 - 20lbs , 20 - 33 lbs 3.Built-in cable clips 360 degree swivel 21" extension 4. VESA 75mm or VESA 100mm compatible 5.Accommodates monitors 18" - 28" 6.Integral cable management neatly stores cables 7. Available Mounting Options: C - Clamp, Grommet, Wall, Other 8. Material : High quality aluminum