About this item TIRE STEM VALVES CAPS-The inner layer of the valve stem cover is designed with luminous material, which can make the car decorated with Tire Valve Stem Caps lights at night. When your wheel starts to move, it automatically flashes and creates a circle of light that makes your car/motorcycle/bike look beautiful.FLUORESCENT EFFECT- One-piece tire valve stem cover features illuminated plastic inserts and clear housing protection. A good valve cover will prolong the life of the tire.WIDELY USED- The inner diameter of tire valve caps is 8mm, fits most cars, buses, SUV, trucks, motorcycles, and bicycles, etc., keeping the tires of vehicles at the proper inflating level.EASY INSTALLATIONIt's can easily tightened use your hand, no need any extra tools, very easy and convenient. It is universal fits for standard American valves. It's also for your families and friends.TIPSWhen installing for the first time, please illuminate the tire valve stem caps with light or sunlight for 5 minutes, the effect will be brighter at night.Specification:- Product Name: Tyre Valve Caps Glow at Night- Material: rubber + ABS + phosphor- Color: As shown in the figure- Height: 1.5cm- Outer Diameter: 1.2cm- Inner Diameter: 0.8cmDescription:Plastic valve caps: Practical valve caps can protect your valves from dirt and corrosion and help you to replace original bad valve cap of tyre.Good quality material: The valve cap is made of durable plastic which can extend service life of tyre.Wide application: Universal Vehicle and Utility Compatibility. Fit for cars, SUVs, trucks, bikes, motorcycle, and other motor vehicles.Package Includes:4/8/12/16/24Pcs * Luminous Tire Valve Stem CapsWarm Tips:if you want mix colors, please leave a message to me.