Features: 1.Grass smell will attract pets, help grinding pet' s teeth to improve health. 2.Promotes clean and healthy teeth while satisfying your pet' s natural instinct to chew. 3.Play with balls can relieve pets' stress, they love to toss or push balls, no more boredom. 4.Different styles balls in this set, for pet' s health, suggested to replace chewing ball in regularly. 5.Made of 100% wild vetch, no chemicals, no glue, all , safe for your pets.Solid and durable. Specifications: Item Type: Pets Chew Ball Material: Wild Vetch Color: Grey Size: -Ball1: Diameter7cm/2.8inch -Ball2: Diameter9cm/3.5inch -Ball3: Diameter6cm/2.4inch -Ball4: Diameter7cm/2.8inch Package List: 4* Chew Balls