4PCS Car Tire Valve Caps Pressure Gauge Monitor Indicator-B091JB33YT

The tire valve stem caps will replace your current boring plastic or stolen caps, give you a warning about the pressureGreen shows that tire pressure is normal.Yellow shows that the pressure is down about 5 pounds.Red alerts you that the pressure is down by at least 10 pounds.Usage: Universal, fits for cars, trucks, bikes and motorcycles with a standard valve stemWeight: 8g/piece(approximate)Size: 23cm * 1cm (approximate)Packing: 4 pieces Monitor Caps