3 Height Adjustments - This monitor stand riser comes with 3 adjustable height levels (9-12-14cm) allowing you to choose the most ergonomic, healthiest and most comfortable viewing angle while working. Simply press the button on the leg and lift the platform to adjust between the different height levels. The size of the product is measured manually, and there will be a 2mm error due to factors such as different measurement tools and measurement methods. Increased Airflow Prevents Overheating - Our adjustable laptop riser is made of power coated steel with a perforated mesh hole platform (37*23.6cm) that improves air flow going towards your device. The holes also help to prevent dreaded overheating and keep your computer cool and in peak working condition. Extremely Stable & Safe - Your new computer stand riser comes with non-slip legs and anti-skid rubber that increases stability and protects your laptop and furniture up to a weight of 20KG from damage. Rest assured that your device is in safe hands while you get more work done. Super Simply Assembly - Our laptop and monitor stands for desks come with 1 platform and 4 legs, all you need to do is just screw the 4 legs into the platform and away you go. No tools needed. Have your laptop table fully installed in 1 minute or less so you can focus more and improve your productivity. Space Saver - You can lift your monitor by the screen riser, and store your calculator, post-it notes, notebooks, folders underneath the stand, save your desktop space and get rid of clutter.