Item Name: Alert Warning Visiable Air Pressure Valve Stem Caps Sensor Indicator Tire Gauge. Install This new pressure cap tight.Determine the correct tire pressure for your tires.Inflate tire to correct pressure.100% Brand New and High QualitySimply look at the color to know if your tire is low or normal.Green 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.Packing content: 4pcs x Tire Pressure Indicator *
