DescriptionMaterial : ABSModel Number : Luminous Valve CapsBrand Name : perfeclanFeature 1 : Tyre Valve Stem CapsFeature 2 : Stem Covers Bike BicycleFeature 3 : Dust Caps MotorcyclesFeature 4 : Luminous Car Dust CapsDescription:Fluorescent Effect: The inner layer of the valve stem cover is designed with luminescent material, and fluorescent powder is added. It must first absorb all kinds of visible light energy and store the light energy before it can automatically in the dark and can be recycled unlimited times.Test:To test whether there is a fluorescence effect, first irradiate the flashlight with strong light for five minutes. The fluorescent effect can be seen in a place where there is . This can be reused. The longer the light is absorbed, the longer the light is emitted.Double Protection:The tire valve cap can protect the tire valve from dust and prolong the service life of the tire.Widely used:The inner diameter is 0.8cm, outer diameter is 1.2cm, Universal size fits cars, bus trucks, SUVs, motorcycles, bikes or bicycles.Easy To Install:Universal tire valve caps be easily installed without tools. screw it onto the tire valve stem. When you want to check the air pressure, it is easy to install or remove.Specification:Material:Type 1\Type 2:ABSType 3\Type 4:RubberSize Chart:Type 1\Type 2\Type 3\Type 4 :1.6cmx1.2cm/0.63inchx0.47inchPackage Includes:4 Pieces Tyre Valve Stem CapsNote:Please allow slightly errors due to manual measurement and different monitors.