Each Valor Fitness Wall Ball Pro is constructed with the competitor and hardcore fitness facilities and box gyms in mind. Constructed of heavy duty stitching for extra strength and durability, the ball will withstand the most rigorous routine and competition. Each ball has a high density stuffing that keeps the rubber chip core centered and balanced during use. The heavy duty vinyl shell provides for a strong grip and increased durability. Available at 6lbs, 10lbs, 12lbs,14lbs,20lbs, and 30lbs.