MORGAN SLAM/DEAD BALL QUAD SET (2 x 5kg + 2 x 10kg) Selling over 10,000 Slam Ball per year, the Morgan slam balls are designed specifically for workouts that will require a ball to be dropped, thrown and/or slammed. Regular medicine balls are not designed to be used for these activities but it's all about the right tool for the job. Our Slam Balls are constructed with an ultra-durable, heavy-duty rubber shell and filled with fine black sand for fluid movement and instability. A rough-textured surface allows for a high-quality grip even when wet. Each slam ball comes equipped with an air valve making it possible to adjust the air capacity and overall firmness, and also acts as a safety feature to assist in dampening the blow. The Morgan Quad slam ball packed is supplied with 2 x 5kg slam balls and also 2 x 10kg slam balls, perfect for a circuit, HIIT and functional training classes. Warranty on the product: Slam balls have a warranty of 7 months for commercial use. In order to increase the longevity of this item, we strongly recommend using this product on rubber floor tiles, carpet, and interlocking floor mats. Avoid using this item on direct concrete or any hard surface. Never slam the ball on the valve (air inlet) side of the ball as any split on the valve area will void the warranty. When inflating the ball, ensure that the needle is lubricated with Vaseline for easy entry into the valve. If this process is not followed, the valve may fall into the ball, resulting in the warranty becoming void.