» Heavy duty weighted ball that bounces » Two tone color makes it easy to identify the sizes » Durable, weather resistant, non-slip surface » Available in the following sizes: 2lb / 4lb / 6lb / 8lb / 10lb / 12lb / 15lb » Not intended for “SLAM” exercises. Using for “SLAM” exercises will VOID warranty. If “SLAM” exercises are desired, a rebounder is recommended.