Our new Slam Ball X are perfect for throwing exercises, with a harder shell than standard medicine balls, great for explosive movements and workouts. New textured surface makes these slam balls easier to grip and more durable in the long run. A set of 6 to 12kg to get you started. Our new Slam Ball X are perfect for throwing exercises, with a harder shell than standard medicine balls, great for explosive movements and workouts. New textured surface makes these slam balls easier to grip and more durable in the long run. Weight Included: 6kg, 8kg, 10kg, 12kg