A fun chewing challenge for your dog—the Everlasting Sprocket features two difficulty for Everlasting Treats. Holds a variety of treats and kibble. Use our original domed Everlasting Treats or Everlasting Treats with Dental Ridges. Increase the challenge by adding smaller treats inside. Made with virtually indestructible material. Stronger than rubber! Great for powerful chewers. Free of latex, vinyl and phthalates. Toy floats in water. Provides hours of challenging play. Treat ball system encourages play which helps reduce anxiety and boredom behaviors. Additional Features: Dishwasher safe. Great for dental hygiene. Available with Everlasting Treat with Dental Ridges in chicken flavor. Large for dogs over 40 pounds. Medium for dogs under 40 pounds. Small for dogs under 15 pounds.