Reduce your dog's chances of poor oral hygiene with Sporn® Durable Marrow™ Chews. The only chewable nylon bones with a jerky flavoured centre! Perfect for strong chewers, nylon shavings act like a toothbrush and help remove tartar from the dog’s teeth. They are made with non-toxic nylon and rubber making them perfectly safe for consumption. Unlike traditional rawhide bones, this bone will last! Features & Benefits Promotes Oral Hygiene: The texture of the bone helps clean teeth and gums and assists with tartar control. Non-Toxic: Made from non-toxic nylon and rubber making them safe for consumption. Long-lasting: Extremely tough for aggressive chewers! Full of Flavour: Filled with jerky flavour right down the middle. Perfect for keeping your dog's taste buds satisfied. Sizing Information X-Small: Recommended for dogs under 10 pounds (.75" x 3.5") Small: Recommended for dogs between 10-25 pounds (1" x 4") Medium: Recommended for dogs between 25-40 pounds (1" x 5") Large: Recommended for dogs between 40-80 pounds (1" x 7.5") X-Large: Recommended for dogs over 80 pounds (1.5" x 9")