Give you a quick visual of a tire that needs air. Fit for all vehicles:car, motorcycle, bicycle, and so on. The human eye cannot accurately distinguish the state of the tire. Knowingthe status of your tiresin a timely manner is critical to your safety and the life of your car. Visuallyalertsyou when the tire preure is low to helpavoid premature tire wear or blowouts from under-inflated tires. The Green/yellow/red systemindicates the level of proper tire inflation. According to the recognized color to display the preure of the tire. 3 Noticeable Colors, Easy to view Greenshows that tire preure isnormal.Yellowshows that the preure is10% lower than standard about 5 pounds. You should inflate the tires in time.Redalerts you that the preure is25% lower than standard at least 10 pounds.And you need tostop drivingimmediately. Easy to install They are very simple to install just like the typical caps.Long product life, can be used for a long time. Copper Core Tire Preure Indicator Caps The item is very durable,wear-resistant, smooth, and not easy to get rusty withcopper core and stainle steelmaterials.Enhances road handling, increases economy, extends tire life Car tire preure monitor valve caps help to avoid premature tire wear or blowouts from under-inflated tires, increasefuel efficiency, safety and control. Key Features Leak-proof Built-in seal ring to avoid air leaking.Rotational screw thread unloading, good seal, dustproof, waterproof. Gear inlays, increase skid resistance. Bra core It is not a cheap one which is made of the plastic core. The use of the higher cost of copper core and gaskets, more durable. Physical detection without any energy, Put an end to chronic leaks of your tires. Although it's a bit expensive, you get what you pay. Cool Looking, Unique Transparent PC cover, very convenient to check tire preure enough or not with noticeable colors, just keep the eyes on the caps instead of actually checking.Easy to read colors.Easy to see which tire has the problem at a glance by walking around tires. Specifications: Material: LED Package Include: 1 x4 PCSCar tire preure detection cap Motor Vehicle Wheel Parts Vehicle Wheel Parts