About this item1. APPLICATION Fits PRESTA/FRENCH valve stems.Replacement for your broken or miing valve stem caps , prevent chronic air leakage, dust,rain, snow and other debris from entering the tire interior.Extend the life of the tires .2.LIGHTWEIGHT Made of extremely light plastic, much more lighter than aluminum alloy.Make your riding on mountain roads easier and save energy. Make your road ride or race faster.3.WILL NOT BE CORRODED The biggest advantage of plastic material is that it will not chemical react with your valve stems like aluminum alloy, will not cause them to stick, and will not damage your valve stems and tires.4.EASY INSTALLATION Installation only need screws it onto tire valve stem .Everyone can screw on it in seconds without any tools . It is easy to install or remove when you want to inflate the tires.5.SATISFACTION High-grade plastic will not be rusted or be oxidized, can be used in any weather . 1. Why should we buy tire valve caps?Tire valve caps help seal the air and block road dust and dirt for sealing and prevent tire leakage, and ensure tire preure is stable, ensuring safe riding.2.Why we choose plastic tire valve caps?Will not corrode the valve stems like metal caps.Light weight will save your save energy,Make your riding easierand faster. Most original bikes are equipped with plastic valve caps. Product detail:Name: Presta Tire Valve CapsMaterial: PlasticColor: BlackSize: 1.3*0.6cm/0.51*0.21inPackage includes:10/30/50Pcs *PrestaValve Caps (Please choose quantity you need) Note: 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.