A. Universal Compatibility: Replacing the old valve core can make the tire look in good condition. It has good sealing performance and helps prevent air leakage from the old valve. B. Durable Quality: The package contains 1 pack of 10 French (Presta) valve cores. These valve cores are copper - nickel plated. Nickel plating improves the corrosion resistance of the valve core and the valve stem, especially when the valve core is installed on an aluminum valve stem, making it more durable, safe and reliable. C. Valve Core Removal Tool: The package also comes with a valve removal tool, which can remove French valves vertically, French valve cores horizontally, and can also remove American valve stems. D. Application Scope: It is suitable for mountain bike wheels of brands such as Stan's, Vittoria, Continental, Kenda, Bontrager, etc. It can also be used for cars, trucks, motorcycles, all - terrain vehicles (ATV), etc. E. Easy Installation: Simply screw the French valve core into the valve stem using pliers or the valve removal tool.