1.The laptop stand with 4 levels adjustable width(7.28" 8.66" 10.03" 11.41") is well compatible with all laptops between 11 - 17.3 inches, such as Apple MacBook 12 / 13, MacBook Air 13, MacBook Pro 13 / 15 / 17 /2018 / 2017 / 2016, Dell Inspiron XPS, HP, Chromebook, and other notebooks PC computers ( 12 inch, 13 inch, 13.3 inch, 14 inch, 15 inch, 15.4 inch, 15.6 inch, 17inch,17.3 inch etc).2.This laptop riser elevates your laptop by 6.3 inches(max) with Angle 15 degrees to the perfect eye level and prevents you from hunching over your screen, reduces neck and shoulder pain.Moreover, the edge of the stand is so smooth that protects you from being scratched.3.Our laptop riser is made of 1/5" thicked ALUMINIUM ALLOY that fairly sturdy to support up to 78lbs (35kg) in weight. .You only need to install 4 screws to meet your different sizes of tablets. The classic screw fixation ensures that the compurter stand is more stable and firm.Non-slip silicone pads are on the top and bottom to safeguard your desk and laptop against scratches and slippery.4.The laptop riser used hollow-carved design and has two holder hands not a whole falt, so there is more space to enable the heat to vent and keep your notebook computer from overheating.