The Champion Sports RHINO Fitness Slam Ball is a durable and versatile training tool designed to withstand the most intense workouts. Filled with sand for optimal impact absorption and no-bounce performance, the black rubber treaded surface provides an excellent grip, ensuring a secure hold during demanding exercises. Ideal for improving muscle mass,increasing heart rate, burning calories, and enhancing hand-eye coordination, the RHINO Fitness Slam Ball is a valuable addition to any fitness routine. Available in various sizes and weights, ranging from 9"D with 6 to 20 pounds of weight to 11"D with 25 to 50 pounds of weight, choose the one that meets your individual fitness goals.