This is a plus-one wheelchair for dogs. Only used for test rides. The tires are clean because it hasn't been used outside. It's a 2-wheel type for use when the hind legs are disabled. It also has a chin rest. Going for walks can relieve stress and be used to prevent bedsores. Includes hind leg cases to prevent injury from dragging the legs. Sizes: ① Approximately 25 cm ② Approximately 10.5 cm For small dogs such as Yorkshire Terriers and Chihuahuas.