Mammoth TireBiter Balls are made real-tire-tough from specially formulated natural rubber and EXTRA Rope is 1.5x stronger than regular rope – the ideal combination for strong chewers! TireBiter Ball features a Treat Station designed to reward small treats during play. Perfect for interactive playing, tossing and tugging. Rope bone features a knot on one end and a tug on the other, and is approximately 20 inches in length.