Our new Pro Stability Balls are made from extra thick burst resistant walls, making them heavier and more resilient than standard Stability Balls. These club quality balls are manufactured from flexton®, a burst resistant material that has undergone static compression testing. The manufacturers recommend a maximum user weight of 600kg. Available in three colour-coded sizes. These Balls carry the CE mark of approval. ISO certified quality system. Product complies with EU Directive 93/42/EEC as amended by 2007/47/EC relating to medical devices. Date stamped on day of production. Made from DINP (diisodecy phthalate) as opposed to the toxic DOP (di-2-ethyl hexl phthalate) plasticisers. Latex free.