Built with a sturdy rubber construction for long-lasting use, the Body Solid(R) Medicine Ball features a textured surface that offers enhanced grip as you strengthen your core and work towards a healthy lifestyle. Minimal Equipment for Maximizing Your Workout Adds resistance to a wide range of upper and lower body exercises Helps strengthen your core and improve overall cardiovascular capacity Great for strength training, flexibility and cardio conditioning workouts Durable Construction Sturdy rubber construction is built for long-lasting use Textured surface ensures superior grip and handling Adjustable air pressure lets you control the amount of bounce Additional Details Diameter: 11''