Pet Safe Material: This dog ball is made of non-toxic and harmless PVC. We have upgraded the manufacturing process to make it thicker and more durable. If water enters the sound tube during cleaning, you can shake the ball to get the water out without worrying about pipe damage.Size of Giggle Ball: 3.46in sizes of the interactive dog toy for you to choose from. Suitable for most dogs to play with, but the wobble ball is NOT for heavy chewer.Funny Friend for Dogs: The dog toy ball will make giggle sound when rolled or shaken, no battery needed. It can not only stimulate the curiosity and hunter instinct of dogs, but also be used for dog training to relieve boredom and depression and vent excess energy.Human-Dog Interaction Toy: The interactive dog ball can not only make your dog no longer lonely, reduce destructive behavior and provide long-lasting entertainment, but also let you play with it and enhance the feelings between the dog and its owner.Perfect After-Sale: We will be committed to providing you with better products and services. If you encounter any product-related problems in your consumption, we will provide you with services including but not limited to refund, exchange, compensation for price difference, etc. Dog Ball