SOLID RUBBER BALL AND DURABLE NYLON ROPE: Heavy duty rubber ball with hollow inside, easy to throw further; durable nylon or cotton rope, resistant to tear and scratch, replaceable; strong non-slip loop. NON-TOXIC AND SAFE MATERIAL WITHOUT TERRIBLE ODOR: Made of superior certified food grade safety rubber without toxicity, for dog playing safety.2.4 inches diameter white ball and 2.8 inches diameter orange ball make it suitable for medium and large dogs. Rope length is 14.8 inches and 12.5 inches.