Powerballs with ABS Anti-Burst-System – Guaranteed safety even when punctured during use. Why settle for less? The Powerball ABS serie is approved by AGR. The ABS material is patented in Germany and the USA. Safety category 4**** Powerball ABS deflates slowly! Now all sizes are available in each colour! Effective, dynamic back training Diverse and easy" " Does not roll away when you stand up" " Guaranteed safety thanks to the patented Anti-Burst-System*" " Size: 45 cm, 55 cm, 65 cm, 75 cm Colours: red, green, blue, terra, silver, marble, 500 kg loadable (90 kg ABS guarantee)