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

• Brand : Other
• Type : Tire Gauge
• Are batteries needed to power the product or is this product a battery : No
• Is this a Dangerous Good or a Hazardous Material, Substance or Waste that is regulated for transportation, storage, and/or disposal? : No