Unfortunately it must be said that here the quality of the products purchased not even begin the promised quality. 2 pieces I bought 2 pieces have to be complained. Load specifications agree with the realistic Belaqstungsgrenze certainly not consistent. 150kg are approved, but when a 7-year-old child einsteigt, wisely without shoes or other sharp objects, bursts the shell. The other ball is leaking from the outset. And when it comes to the complaint of the balls, want neither Amazon nor the supplier know anything about it and try to wriggle out and try the statutory warranty period to let pass with fadenscheinichen arguments. So here you can only say AWAY !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!