QitinDasen 4Pcs Premium Car Tire Tyre Pressure Monitor Valve Stem Caps, Warning Safety 3 Colors Sensor Indicator, Dust Cover Air Caps

〓 Tyre pressure monitoring caps are a simple way to check tyre pressure. With a simple traffic signal color system, you can quickly see if the tyre pressure needs to be modified. 〓 Material: Made of Chromed Metal and PC. 〓 3 Colors Monitor: Green, yellow, Red system indicate level of proper tire inflation. According the recognize color to display the pressure of the tire: Green shows that tire pressure is normal; Yellow shows that the pressure is 10% lower than standard; Red alerts you that the pressure is 25% lower than standard. 〓 Safety: Car tire pressure monitor valve caps, visually alerts you when the tire pressure is low. Help to avoid premature tire wear or blowouts from under-inflated tires, increases fuel efficiency, safety and control, extends tire life. 〓 Widely Used: Suitable for car, motorcycle, bicycle and so on. Fit for 32～36PSI (2.2～2.4Bar).