TIGUAR Safety Plus - universal gymnastics ball, suitable for strengthening muscles, improving balance and coordination. Thanks to the ball, the deep muscles of the back, which normally do not work, are put to work. The ball is suitable for stretching exercises and relaxation, it is an excellent prevention for a healthy spine. The specially formulated material prevents rapid deflation, as well as a sudden drop, even if the ball is mechanically punctured. The ball can withstand a load of even 450 kg! Suitable for commercial use in sports clubs, pregnancy classes, the elderly, rehabilitation centers. Technical description: Diameter: 55cm Fully inflated ball circumference: 173cm Maximum recommended user weight: 150kg Maximum load: 450kg Anti-burst material (the ball does not explode even in case of mechanical puncture) Instructions for use: The ball must be kept at a safe distance from sources of strong heat Inflating the ball using compressor: the first time the ball must be inflated 5cm more than the normal height. After 12-24 hours, the ball is slightly inflated, leaving the specified height. In this way, inflated balls acquire optimal properties. Inflating the ball using hand pumps: It is recommended to wait 24 hours before inflating the ball for the first time. keep at room temperature. The first time it is inflated to 10% less than optimal height, after 7 days it is inflated to full height. In this way, inflated balls acquire optimal properties.