Features: Professional Brass Presta Valve Core: Crafted from quality brass, this durable valve core ensures a secure and leak-proof connection for your mountain bike tires, providing reliable performance on various terrains and conditions. Leak-Proof Valve Core For Mountain Bike: Designed to effectively prevent air leakage, this precision-engineered valve core is perfect for tubeless road bike tires, offering a tight seal and consistent pressure retention for smoother rides. Universal Presta Valve Core Presta Converter: Compatible with various models of bike tires, this versatile valve core easily replaces standard Presta valves, ensuring a seamless fit and enhanced durability for long-lasting use. Durable Brass Bike Tires Air Valve Core: Built to withstand frequent use, this sturdy brass valve core resists corrosion and wear, making it an ideal choice for cyclists seeking a reliable and long-term solution for their bike tires. Bicycle French Leak-Proof Valve Cores: These high-performance valve cores are engineered to provide an airtight seal, preventing air loss and maintaining optimal tire pressure for tubeless and standard bike tires across different riding conditions. Specifications: Material: Copper Length: 2.6cm Note: Due to the screen lighting effect, the actual color of the product may be slightly different. Due to manual measurement, please allow size error. Include: 10*Valve Cores