Features of bouncing ball: 1)material:Rubber BR9000 2)Diameter:27mm,30mm,32mm,35mm,38mm,45mm,49mm,60mm Features of bouncing ball : 1)material:Rubber BR9000 2)Diameter:27mm,30mm,32mm,35mm,38mm,45mm,49mm,60mm3)We have CE,EN71,ISO9001:2000 for the balls