MATERIAL: High-Quality Zinc Alloy+Non-Slip Rubber Pad. COLOUR: Silver ACCESSORIES: 1 pair USE: For all types of laptops and ipads. POSITION: 15 degrees, the optimal viewing angle for the human body. Size: 39*36*6.6mm WEIGHT: 49g ADVANTAGES: Good angle when typing. It protects your laptop from directly touching the surface that can lead to scratches. No need to carry a separate stand. Space saver and less effort.