Maintain your tires’ performance and safety with our Car Tire Pressure Gauge Cap Sensor set. These innovative valve stem caps provide a quick and easy way to monitor your tire pressure.  It also helps you avoid premature tire wear, blowouts from under-inflated tires, and reduced fuel efficiency. With a simple color-coded system, these caps make it easy to visually check your tire pressure at a glance. This allows you to easily tell if your tires are always properly inflated.  Note: Non-returnable.