Features:1. High quality: made of high-quality materials, safe and environmentally friendly, durable, if it is not human or accidental damage, it has at least five years of service life.2. Lighting principle: The sphere light-emitting portion is designed with high-tech fluorescent material. As long as there is sunshine, flashlight, flashlight, mobile phone and other light sources, it can be luminated at night. It is a few minutes under the glare, uniform brightness, and can be emitted for 1-3 hours.3. No battery: this football does not require a battery, as long as there is light or ultraviolet light, energy saving.4. Two sizes: high engraving accuracy, good sealing, and 2 sizes.Specification:Product weight: 19cm ball; 370g; 21.5cm ball: 400gProduct Size: 19cm ball diameter 19cm / 7.48 in; 21.5cm diameter 21.5cm / 8.46inProduct material: PUProduct Color: ColorfulNotice: Due to the difference between the display and the lighting effect, the actual color of the item may be slightly different from the color display. Thanks Due to manual measurement, please allow the measurement deviation of 0-1 cm.