Packing list: 2 x Red Bicycle Rear Reflectors 2 x White Bike Front Reflectors Specification:material: plastic Size: 6cm*4.5cm Color: red and white Features: The plastic material makes the front and rear reflectors of the bicycle have good waterproof performance and can be used in rainy days. Increases visibility in low light, highly reflective to ensure safe riding. Not easy to be damaged and deformed, to ensure that it can be used for a long time. No battery required: The spoke warning reflector doesn't need the battery to turn around, which can avoid many troubles caused by low battery and make your ride smoother.