Quantity: 72 pieces bicycle wheel spoke reflectors in 6 colors, 12 pieces of each color.The bicycle spoke reflector is 75mm in length, 5mm in outer diameter.Suitable for spokes with a diameter of 1.8 to 2.0 mm. Material: The bicycle reflective clips are made of high quality ABS plastic and colorful reflective film for durability and long service life. Reflective function: Under the light, it reflects and gives a safety warning, it is easy to find the vehicle when driving a long distance. Easy assembly: push the spoke reflector towards the spokes.If the spokes are no longer needed, they can be removed to loosen the spokes, which is very easy to install and remove. High visibility: Colorful reflective clips on the wheel spokes improve safety at night and during bad weather conditions.It's just a bike reflector, so it can't light up if you ride in the dark without a light, it requires an external light.