High Quality Anti Burst Gym Pilates Yoga Birth Ball. Suitable for all ages, this exercise ball is recommended for 165 cm and over. Gym balls can help strengthen, rehabilitate and tone muscles throughout the whole body including your bodys core muscles which are so important for good posture. Due to the thickness of the anti-burst technology, the ball will require inflation in a warm room to enable the ball to stretch to its full capacity. Set includes ball and pump. 65cm diameter gym ball. Set ball plus pump. Pregnancy and post natal exercise. Tested and certified anti burst exercises ball. Maximum user weight 200kg (31st 6lb).