Materialhe interactive light up dog ball made of high quality silicone material ,BPA-free TPR, durable and study, soft, Bite resistant and easy to clean. Size: The diameter of the ball is 5.5cm(2.1inch), which is a little smaller than normal tennis ball. easy to carry,The highly vivid colors are ideal for engaging with your dog day or night, soft, suitable to play with in the yard, home, park, or shore Flashing Ball. The ball will glow when it be hit, and lasts 10 seconds, which will attract the attention of the dog. Even in the dark ,your dog could play with the flashing ball happily as the flashing could tell the dog where it is. Elastic dog ball: elastic dog ball can let the cranky dog keep chasing, not only let the dog happy exercise, but also trains the agility of dogs, encourage them to exercise, helping them stay healthy and strong Interactive pet toys: they can play with the LED dog ball, and the ball can bounce and shine in the colorful light to attract your dog's attention,it will help strengthen the bond between you and your dog