Universal Presta Valve Core Replacement: Our Presta valve cores are compatible with all presta valve systems, ensuring a perfect fit for tubeless mountain bike, road bike, gravel bike, and cross-bike tires. Optimal Performance: The Square1 Presta Valve Core is designed specifically for tubeless tires, providing reliable performance and excellent sealing with every use. Easy Air Inflation Solution: If you encounter difficulties inflating your tubeless bike tires, replacing the presta valve core can be a quick and effective fix. Comprehensive Package: This kit includes 10 presta valve cores, a handy valve core extraction tool, and 10 valve body covers. The extraction tool simplifies the removal of old valve cores and installation of new ones, making maintenance hassle-free. Keep several valve cores and the extraction tool in your bike bag for convenient on-the-go repairs. Key Features: - Compatibility: Works seamlessly with all presta valves for various tire types. - Material: Durable construction for long-lasting reliability. - Size: Standard size suitable for all presta valve systems. Practical Applications: - Quick fixes for flat tubeless tires during rides. - Preventative maintenance to ensure optimal tire performance. - Ideal for cyclists who frequently ride in diverse terrains. Square1 is committed to customer satisfaction. If you experience any issues with our Presta valve cores, please reach out to us for assistance or a refund.