Made of hard rubber, Zanies® Hard Rubber Space Station stands up to hours of chewing fun and features gum-massaging nubs to improve dental hygiene. The Zanies® Space Station is made of hard rubber to stand up to hours of chewing fun and features gum-massaging nubs to improve dental hygiene. These fun dental toys will send dogs to outer space. Ideal for even the most aggressive chewers and teething puppies. Approximately 5 1/2". Color is red.