I already had my doubts when I saw the ball the first time in hand but it was worse than had been feared. The seams were not completely closed and when I tried to inflate it is not only the pump hardly have been introduced but there is still leaked air. When I tried to pull out the air pump proved the impossible. After I tried it with violence is also the head of the pump stopped. The valve has been followed so depressed that it has slipped below the shell. Strongly advise against purchasing. Better a few euros more for better quality prints. I'll do it too. For the price it pays to not even send him back ... :(
