Kettler Exercise Ball – with Pressure Points massage all parts of the body to promote blood circulation and deep relaxation. - This anti-burst exercise ball is particularly versatile and suitable not only for body stabilizing balance exercises, but also for effective training workouts. - Combined with resistance training, this exercise ball can help you sculpt and tone your abs, arms, and legs. - After training, this ball can be used as a seat to strengthen the stomach, back and pelvic muscles. - Diameter: 65cm - Comes with Hand Pump.