Size: S,10*10*3.5cm, L:12.5*12.5*4cm. Material: made from non-abrasive and non-toxic natural rubber that is completely safe for your pets to bite or chew. Since this IQ Dog Toy is made of natural rubber, it is bouncy strong, durable, and bite-resistant. Needle design: This Dental Chew Ball is made of flexible rubber with splits.This Chew ball has a whistle hiding inside the splits, when bite, it will come out whistle sound. Teeth Health: whenever your pet’s teeth go into these grooves, the small spikes serve as a brush to clean their teeth and massage the gums. Consequently, it reduces the dental plaque and tartar and increases the endurance and strength of the enamel. Therefore, you can protect your pet from contracting several oral diseases. Funny toy: Dogs and cats often resort to destructive behavior to relieve stress and loneliness.this Dog Toy arouses pet’s interest easily and kills their boring time. When you indulge them in this toy, stay assured that your home furnishing products like carpets, wooden interiors and curtains are saved from destruction. When you have this, you get a chew toy, gum massager, and teeth cleaning toy, all-in-one. if there were any problem of product or service, we will help you to solve it at first time, and any of your suggestions are precious and welcome.