1. Material: plastic 2. Excellent damping performance, can effectively reduce the load on the rim of the valve hole size 3. Unique opening design for easy insertion and installation 4. Classic black appearance for different color tires 5. Light weight: easy to carry and store for daily use and replacement 6. Better performance: cleaner, more aesthetic, tighter air opening, no need to lock with metal hoop 7. Individual size: about 7.5 x 9mm
