Features: Brand new and high quality Circular chamfering,smooth experience. It provides you with great advantages of micro aiming and tracking, and has the feeling of floating. Round Edges Perfectly polished ultra smooth round edges will provide you with the smoothest sliding ever. feet sticker is made of aluminosilicate glass, fast and smooth. Used for Viper Ultimate Wireless mouse. Specifications: Material: Premium Aluminosilicate Glass Thickness: 0.8mm Quantity: 1Set Used for: Viper Ultimate Mouse Package Includes: 1Set x Mouse Feet note: 1. Confirm that the residual part of the President's foot sticker is cleaned before installation 2. The glass feet will also be worn by particles such as dust 3. The glass foot sticker may be damaged in of objects and severe impact 4. The glass foot sticker cannot be removed and pasted repeatedly after installation 5. Please regularly check the bottom of the foot sticker and the mouse pad for dirt and other impurities to extend its use . If you have any other problems, please contact us .