20pcs Presta Valve Core for Bicycle Tubeless Road MTB Bike w/Stan's, Vittoria, Continental, Kenda and Mor

Box contents: 20 pieces of Presta valve cores that you get in a bag, enough for your bike. You can also share them with your family and friends, they are good and necessary bicycle utensils. Advantage: a small, handy tool, approx. 1" long It is used to replace the leak of the old valve and make the tyre taper, prevent air leaks from old valves, compatible and good air tightness, they are more durable, safer and more reliable Durable and sturdy: these valve cores are made of quality copper, improve the corrosion resistance of the valve core and valve stem, especially when installing the valve core into a brass valve stem, more durable, safer and more reliable Fitment:Presta valve cores (French valve core) are mainly used in bicycles, universal presta valve cores, compatible with Stan's, Vittoria, Continental, Kenda, Bontrager, Road and MTB tubeless valve stem EASY TO INSTALL - Use pliers or valve removal tool to screw on the Presta valve stem. You no longer have to worry about bicycle tyres, so you can ride your bike with ease and joy when you are alone or with your friends