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Basically, the balls are pumped up. If you inflate more air, please do not exert any pressure on the valve. In no case use a bar pump, because here is the danger that the valve in the ball slips too large (this is not a reason for complaint). Please use a helmet or hand pump with a flexible hose on the needle or an electric pump. Please note further, you should inflate the ball too much, so that the seams tear, this is not covered by the warranty.

If a ball bursts due to temperature fluctuations or loses much air, then this is NOT the warranty, is not a reason for complaint and there can be NO exchange or refund! The ball should only be inflated for direct use on game pressure. Otherwise always drain some air. He must not lie in direct sunlight (for example, on the beach or behind a windowpane), as the ball can then burst. The same result would arise if the ball is used at cold temperatures and then stored in warmer rooms. The inflated air would expand to damage the bladder.