HuaYang Bike Bicycle Car Tire Tyre Wheel Valve Caps LED Flash Light Lamp Fireflies(Yellow) Bright LED will turn on while the vehicle is moving and off when the vehicle comes to a stop Fits most valves of road/ mountain bikcycles, motocycles and cars Waterproof & shockproof Enhances safety by increasing visibility at night and during bad weather conditions Package Content: 1X Bike Wheel Valve Cap