Expert Features 2 in 1 Monitor Laptop Holder NB F80+ FP-2 Material: Aluminum Alloy, cold rolled steel, plastic cover Suggested Screen Size: 17″-30″ Suggested Laptop Size: 10″-17″ Laptop Thickness: 5.0mm~21mm Loading: 2.0-9.0kgs (4.4-19.8lbs) (Pls make sure weight of your screen is within this range, or the gas spring arm cannot work!) Tilt: +85°~ -30° Swivel: -180°~ +180° Rotation: 360° VESA: 75*75mm/ 100*100mm 2ways installation: clamping and grommet Clamping thickness: 10-90mm, clamping width at least 40mm Grommet hole diameter: 10-60mm