【Enduring Material】: This tire valve stem cover is made of high-quality luminous ABS material, built in high quality phosphor, small and compact, easy to hold and use. Avoid prolonged exposure of the valve cover to water or snow, it is rust and corrosion resistant, no stuck on the valve. A good valve cover could prolong the service life of the tire. So with its' protection, you could drive outdoor during extreme weather without worries. | 【Luxury Look】: This tire valve stem caps is designed with luminous material. It is self-illuminating and does not require electronic devices. This means it absorbs light when there is light, and emits light when it is dark. Every time you drive in the dark, with the move of car wheels, the valve cover automatically flashes and forms a circle of light, which makes your car have a charming look. And this luxury look adds personality to your car. If you want a cap that has a color to match car, this is it. It's cool and funny. | 【Perfect Protectors】: Our tire valve stem cover features illuminated plastic inserts and clear housing protection to prevent valve stem corrosion. Besides, it prevent the mud, dust, sand, dirt and road debris into the tire, preventing the valve from leaking and ensure the safe driving. If you are driving in harsh road conditions, there's no air leaking. Ensure a safe condition on long, tough drives. | 【Easy to Install】: The package includes 12PCS valves stem caps. You can install it easily without any tools. During installation you could tighten it by your hand because this tire valve stem caps designed with a swivel thread. After you finished the installation they won't fall off during traveling. If you want to check air pressure, it's also simple to remove. Please remember to let sunlight hit the tire valve stem caps for a while to achieve the best night effect. | 【Wide Application】: The inner diameter of this tire air cap cover is 0.8 cm/0.31 in, the outer diameter is 1.2 cm/0.47 in, and the inner height is 1.6 cm/0.63 in. This tire valve cover can be screwed onto various styles of tire covers, it is suitable for almost all car tires, and fit for most of SUVs, motorcycles, cars, trucks, and bikes. It is an ideal personality gift for yourself, parents, colleagues, friends and loved ones.