The Fitness Mad's Burst Resistant Swiss Ball with a load rating of 300kg. Perfect for Fit Ball workouts, yoga, Pilates or physiotherapy and can be used as a chair to aid core strength to help improve posture. Dimensions: 550mm. Weight: 1.1kg. Colour: Blue. Material: 6 Phthalate and Heavy Metal Free PVC. Recommended user height - 5'6" and under. No pump supplied. Safety Information:. Rated as suitable for 300kg load. SGS Labs tested as burst-resistant at over 500Kg static load. SGS Labs tested with a static load of over 1.5 tons without failure. Never leave the Swiss Ball near a heat source.