The 500kg Studio Pro Swiss Balls are made from very thick and durable PVC. They can bear over 500kg in normal use. In the event that the stability ball is punctured, the anti-burst technology will ensure that they deflate slowly and safely. Size 55cm. Recommended user height - best for people 5'6 and under. Weight - 1.38kg. Material - 6 Phthalate and Heavy Metal Free PVC
