Car Tire Valve Cap, 12PCS Blue Fluorescence, Bike Motorcycle Noctilucous Illuminated Valve Cap, Universal Wheel Valve Caps for Car Truck Motorcycles Bike Tires, Need Sunlight to Absorb Energy

【DOUBLE PROTECTION】- The fluorescent car tire valve caps feature illuminated plastic inserts and clear housing protection to prevent valve stem corrosion., Our tire valves caps inside with the Rubber Seals, create a tighter, more effective seal, so there’s no air leaking on long, tough drives., 【FLUORESCENT EFFECT】- 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., 【NOTE】- Since the fluorescent material needs to absorb the light source, it glows at night. Stem caps do not absorb light sources when stored in airtight packaging for extended periods of time.