Reflective football luminous football student youth team training luminous ball outdoor sports competition equipment features: 1. High quality: Made of high-quality materials, safe and environmentally friendly, sturdy and durable, with a service life of at least five years if it is not damaged by man-made or accidental damage. 2. Luminous principle: The luminous part of the sphere is designed with high-tech fluorescent materials. It can glow as long as there is a light source at night, such as sunlight, flashlight, flashlight, mobile phone, etc. It will light up for a few minutes under strong light, with uniform brightness and can last for 1-3 hours. 3. No batteries required: This football does not require batteries, as long as there is light or ultraviolet light, it will glow, saving energy and protecting the environment. 4. 2 sizes: High engraving precision, good sealing, 2 sizes to choose from. Specifications: Product weight: No. 5 ball: 400g; No. 4 ball; 370g Product size: No. 4 diameter 19 cm / 7.48 inches; No. 5 diameter 21.5 cm / 8.46 inches Product material: PU Product color: Color Note: Due to the display and Lighting effects are different, and the actual color of the item may vary slightly from the color shown on the picture. Thank you Please allow 1-2cm measurement deviation due to manual measurement. Includes: 1 football image