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.