Universally Compatible: By replacing the old valve leak, the tire will be rejuvenated. Good sealing. Stop Air Leaks From Old Valves Durable Quality: The package contains 1 pack of 10 Presta valve cores. These valve cores are copper-nickel plated valve cores. Nickel plating increases the corrosion resistance of the valve core and valve stem, especially when the valve core is installed in an aluminum valve stem. More durable, safer and more reliable Valve core removal tool: The package also includes a valve removal tool which allows the French valve to be removed vertically and the French valve core to be removed horizontally. The American valve insert can also be removed Application: Fits Mountain Bike Wheels, Stan's, Vittoria, Continental, Kenda, Bontrager, etc. Also suitable for cars, trucks, motorcycles, ATVs, etc Easy to install: use pliers or a valve removal tool to screw in the Presta valve stem