Description: Installation of these valve cores is simple and convenient. You only need to use pliers or the valve removal tool to screw them into the valve stem, and then you no longer need to worry about bicycle tires. Brass valve core effectively reduces the possibility of air leakage and greatly improves its performance. Made of high-quality brass, the valve cores are durable, corrosion resistant, and safe, especially when they are installed in the brass valve stem. The length of the valve core is 2.6cm, the diameter is 0.5cm. Tubeless valve cores are suitable for road bikes, folding bikes, mountain bikes and other bicycles with french valve. Item Name: French Valve Cores Material: Brass Color: Silver Installation Position: Tire Valve Surface Treatment: Nickel Plating Function: Tire Air Intake, Prevent Tire Air Leakage Features: Leak-Proof, Corrosion Resistant, Easy Installation Applicable Scopes: French Valve of Road Bike, Folding Bike, Mountain Bike And Other Bicycles Size Details: French Valve Core Size: 2.6cm x 0.5cm x 0.5cm/1.02" x 0.2" x 0.2" (Approx.) Valve Core Removal Wrench Length: 18mm/0.71" (Approx.) Notes: Please place it out of the reach of children, beware of swallowing. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Installation Steps: 1. Open the valve cover. 2. Pull out the valve core with tool. 3. Insert and tighten the new valve core. 4. Put on the valve cover. Package Includes: 20 x French Valve Cores 1 x Valve Core Removal Wrench