BAZHOU Tire Pressure Monitor Valve Stem Caps: With tire valve stem caps function, it can monitor the real situation of tire pressure. High-quality copper core with high-density sealing ring. Increase tire stability and travel safely. Car tire pressure monitor valve caps help to avoid premature tire wear or blowouts from under-inflated tires, increase fuel efficiency, safety, control and extend tire life. Three-Color Display: Display the tire pressure according to the recognized color, which can easily ensure the normal level of tire pressure. The green/yellow/red system indicates a level of proper tire inflation. According to the recognized color to display the pressure of the tire, green shows that tire pressure is normal Yellow shows that the pressure is lower than standard and red alerts you that the pressure is 25% lower than standard. Anti-Seize Design: tire valve stem caps come with a metal shell and plastic insert which will prevent the valve stem from corrosion, special in wet/cold areas. Built-in One-piece sealing ring inside the plastic liner with leak-proof function. Prevent damage to the car due to tire leaks. Easy to Install: The design of the tire valve cap rotating thread makes it easy to twist when to install or remove. Notes: When you make an automatic car wash, removing these air caps would be better. Widely Used: Our tire valve cap is the universal style. The valve caps universally fit most cars, bicycles, SUVs, trucks, RVs, and other motor vehicles, etc. Warning: When removing a cap. make sure that you do not lose the black washer. They are inclined to fall out and are very difficult to find again. It is advisable to remove them before your car is serviced at a garage. Delivery Quantity: 1set Package Contents: Only the above package contents, excluding other products. Size: 0.9*0.9*2.3cm (Manual measurement, please allow 1-2 cm measurement error) Color: colorful (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)