Chuckit! Ultra Tug, a durable rubber ball on a leash-style cord, is great for tug-of-war games with your dog. Designed for the most demanding use, this is no ordinary ball. Best ball for tugging games, with a durable 2-ply nylon handle. Developed to have high bounce, high buoyancy, high visibility, and high durability. Compatible with Chuckit! Launcher. Approximately 2.5" diameter ball.