High Quality Material Bestand Laptop stands are made of 7000 series aluminum alloy which widely used in aerospace equipment. It is harder and more wearable than laptop stands which are made of 6000 series aluminum alloy. After oxidation treatment, Bestand laptop stands have a better corrosion resistance, hardness and wearable quality. Stable & Widely Compatible 4 mm thickness, 66 pounds load-bearing capacity, the notebook stand is stable and not distort. Compatible with 11-16" apple MacBook, MacBook Pro/ Air, Powerbook, Asus, Sony, Dell, HP, Toshiba, Lenovo and other notebooks. Whether its high quality or load-bearing capacity, you will not regret choosing Bestand laptop stands.