They are tire valves caps, which are made of safe and gentle copper material, which are durable and can serve you for a long time. Made with excellent craftsmanship and reasonable design, they can effectively prevent air leakage and prevent dirt and other objects from damaging the tire core. These will be good choices for your car tire caps. Features -Material: Copper. -Size: About 1.20X1.10X1.10cm/0.47X0.43X0.43inch. -Practical: Can help prevent leakage, dirt and other objects from damaging cores. -Easy to install: Just need screw them onto tyre valves stem. - : Made of quality copper material, quality material ensure . And solid and durable design make them fit for long time use. -The design is simple, easy to replace and use, which can you . -The products can not only help prevent leakage, but also prevent dirt and rain from entering your car, extending the of your tires Package list: 1 x set of tire caps