Material: sarin/surlynsynthetic rubberColor: beige (green after luminescence)Size: 42.67mmElasticity: 75% or moreHardness: more than 80%Flashlight battery: 3 AAA batteries (not included)11. Bright fluorescence for night games: Use our luminous golf balls to enjoy a golf game at night. They emit bright fluorescence and can be easily charged with a UV flashlight or any flashlight. 22. Real golf balls: There are no LEDs inside, and these golf balls do not have built-in LEDs. They are softer than LED night balls, so they look like real balls when hitting the ball. 33. High-performance ball: The luminous golf ball is a high-performance ball. The outer layer is made of high-quality sarin/surlyn, and the inner layer is a synthetic rubber with fluorescent powder to ensure bright night light. 44. Perfect gift idea: This is the best gift for your father, business partner or close friend. Give it on birthdays, Father's Day, Christmas, or thank you, and let them know that you appreciate them. 55. Increase sports fun: golf at night is a very interesting sport. Our fluorescent golf balls can help you find your glowing golf balls quickly.Due to the lighting effects and shooting angles, there is a color difference in the product, please understand.Due to manual measurement, there is a tolerance in the product size.6 * Fluorescent Balls1 * Flashlight (without battery)