Product name: Gravity intelligence rolling ball Product size: 43 mm/ 1.69 inches Product color: As shown in the figure Product material: Silica gel/ ABS Product features: This gravity smart rolling ball is an electric toy designed for small cats, which can automatically roll and make sounds to keep your pet happy. The bite-resistant design allows the cat to chew as much as possible, relieving the boredom and stress of the cat and letting them enjoy playing. This cat ball can not only train the cat's reflexes and sports ability, but also provide self-enjoyment fun, which is an excellent pet toy. Precautions: 1. As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can feel free to contact mewe will give you some suggestion, but it is for you reference only. Shipment includes: 1 pcs Gravity intelligence rolling ball