Durable MaterialThese glowing tire valve stem caps are made of durable rubber material, which can prevent mud, dirt, and rainwater from tire valve cores.LuminousThe inner layer of the valve stem cover is designed with luminous material, and has no need for electricity. When your wheel starts to move, it will automatically flash and form a circle of light to make your car look beautiful.Easy to InstallThe tire valve stem caps can be easily tightened by hand without any additional tools, very simple and convenient. It is generally applicable to standard US valves. It also applies to your family and friends.Widely ApplicationsThe tire valve cover has an inner diameter of 8mm, which is suitable for most cars, buses, SUVs, trucks, motorcycles, and bicycles, etc., to keep the tires of the vehicle at the proper inflation level.Warm TipsWhen installing for the first time, please irradiate the tire valve cover with light or sunlight for 5 minutes, the effect will be brighter at night. The package contains 12 pieces,Color: blue