DOMOM Tire Pressure Indicator Valve Stem Caps(4PCS)

💎Give you a quick visual of a tire that need air. Fit for all vehicles: car,motorcycle,bicycle and so on. The human eye cannot accurately distinguish the state of the tire. Knowing the status of your tires in a timely manner is critical to your safety and the life of your car. Visually alerts you when the tire pressure is low to help avoid premature tire wear ​or blowouts from under-inflated tires.Green/yellow/red system indicate level of proper tire inflation.According the recognize color to display the pressure of the tire.  3 Noticeable Colors,Easy to view 🟢Green shows that tire pressure is normal .🟡Yellow shows that the pressure is 10% lower than standard about 5 pounds. You should inflate the tires in time. 🔴Red alerts you that the pressure is 25% lower than standard at least 10 pounds.And you need to stop driving immediately. Copper Core Tire Pressure Indicator Caps The item are very durable,wear resistant,smooth and not easy to get rusty with copper core and stainless ste