Features: 1.Made of non-toxic rubber, resistant to bite. 2.Effectively clean and exercises the teeth, reduce breeding of dental plaque and tartar, thus preventing a variety of oral diseases. 3.It is a good gift for your pet dog, cat. Note: 1.Please allow 1-2mm error due to manual measurement, make sure you do not mind before you bid. 2.The colors may be different for different display, please understand.