Durable and Safe -- Made of high-quality TPR rubber, durable and lightweight to float on water. Ideal for owners and dogs to do interactive games. Exercise -- Dog Balls can be thrown into the distance for the dog to connect, exercise the dog's reaction speed, and make the dog move more agile. Interaction -- Encourage interaction to help the dog and owner establish a tacit bond with each other. Raised Design -- The surface of the dog ball is covered with most of the raised particles, which is conducive to cleaning the dog's mouth and eliminating tongue coating bacteria. Unique Design -- The double color matching design can attract dogs' interest in chewing toys, and the built-in sound device can effectively prevent dogs from falling off and swallowing during the chewing process. Material: Rubber. 6.5Cm in diameter, hollow ball, weighing about 53g, with BB call, crisp sound.