ENHANCED AIR TIGHTNESS: Our Presta valve cores are meticulously engineered with a triple-thread precision design that surpasses industry standards for leakage. This ensures your bike tires maintain optimal pressure, enhancing performance and reducing the need for frequent adjustments. BUILT FOR DURABILITY: Constructed from robust brass and alloy materials, these valve cores are crafted to endure the demands of daily cycling. Their sturdy design guarantees long-term reliability and performance, making them an essential upgrade for any cycling enthusiast. UNIVERSAL COMPATIBILITY: Designed to fit a wide range of tubeless valve stems including popular for Stan's, for , for , for , and for . Whether you're hitting the road or the mountains, these valve cores a seamless fit for both road and mountain bikes. SIMPLE INSTALLATION PROCESS: Equipped with an easy-to-follow installation method, these valve cores can be quickly attached using pliers or a valve removal tool. This hassle-free setup allows you to spend less time on maintenance and more time enjoying your ride. Color: As Shown Material: Copper Package Contents: 20 x presta valve cores Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.