Interactive vocalization & biting pig balls enjoy the fun of chasing Squeeze sounds to attract the dog's attention The integrated built-in sound generator prevents accidental swallowing and detachment The throwing and picking interaction allows you to have fun playing at home The inner wall is twice as thick and not afraid of damage - super resistant to biting Safe material, safe to eat, food-grade TPR raw material The Fun Play Relieving Boredom is equipped with built-in sound, anti-bite and high elasticity, and meets the EU environmental protection standards Product information Product Name: Night Light Pig Material :TPR Function: Teeth grinding, teeth cleaning, interactive dog training Features: High-elasticity sound, chewy, non-toxic and odorless Diameter of the small sphere :5cm The diameter of the medium-sized sphere is 6cm Diameter of the large sphere :7cm.