5mm anodized aluminum alloy The laptop & tablet stand supports most devices from 10 - 15.6 inches laptop. The laptop & tablet stand provides 7 levels height adjustable. You can take and close it in 1 second. Easy to carry. Xback design improve airflow to keep your laptop & tablet from over heating. Non-slip silicone mat on the hook and 4 anti-skid silicone pads on top & bottom, it protects your laptop from sliding and scratches.