Made of safe and soft eco-friendly materials, will not hurt dog’s teeth during training, protect dogs’ health Decompression and increase pet’s IQ, improve pet’s feelings of people and dogs Built-in voice airbag that can emit sound to attract dog’s attention. Easy to clean, leave no dirt, let your dog play healthy. Floating design allows dogs to play in the water. Size: about 20cm in diameter Due to factors such as as manual measurement and display differences, there may be slight differences between individual products and pictures, please excuse me.