MATERIAL & SIZE: Made of natural rubber, safe and durable for dogs to chew. Dimension: approx. 9.5cm/3.7inches TEETH CLEANING: This chew toy with spike surface can cleaning dog’s teeth, reducing plaque build-up and preventing gum disease. PERFUME OF MILK: Adding the smell of milk can make dogs like it better and remove bad breath. BELL DESIGN: Nipple shape design with a bell, bell sound can let your dog feel exciting. INTERACTIVE TOY: This chew toy is elastic. Exercise the pet's muscles and promote the relationship between owner and pet.