[Dog Outing Ball] The shepherd ball weighs less than 0.1 pounds and has a diameter of 2.75 inches (approximately 7 cm). The size is just right for the dog's mouth and is convenient for the dog to bite. Dogs will love this size. This ranch ball is made of soft material, even if it is bitten, it will not cause it. [Dog Tennis] The dog ball is a dog ball made of foamed plastic polyurethane elastomer. This dog ball is roughly the same size as a tennis ball, lighter in weight, more flexible and stronger. This dog ball is suitable for large dogs and puppies. An indestructible ball for dogs. [Safe and healthy] This busy dog ​​ball is safe, healthy and odor-free, allowing your dog to enjoy the fun of competition and active chewing. This toy can be washed with water and is easy to dry, providing a clean toy for dogs. [ETPU New Material] This dog ball uses ETPU material. The ETPU material itself not only has excellent thermoplastic elastomer and deformation elasticity, but also has the properties of light, insulation, sound absorption, shock absorption and other foam materials. Compared with other types of rubber and plastic, it has many advantages such as low energy consumption and low pollution.