Our Studio Pro Ball is rated at a massive 500Kg and is one of the toughest balls available. These balls have been extensively tested by SGS Laboratories for burst-resistance and static loading. Perfect for weight training, Fit Ball workouts, Yoga, Pilates or physiotherapy. The ball comes boxed complete with blaster pump. Features Includes pump and free online workout guide Material: 6 Phthalate and Heavy Metal Free PVC Colour: Purple Size Weight Recommended User Height 55 1.3 Best for people 5'6" and under 65 1.7 Best for people between 5'6"-5'10" 75 2.1 Best for people over 5'10"