After two failed attempts by Power Systems (the company that actually ships the ball) to send the correct product, I finally gave up! First time they sent me the wrong type of ball, and on the second attempt they sent me the right type but the wrong size! After two weeks it was frustrating so I gave up! Even though customer service was nice and let me keep both balls at no charge and without shipping them back, all I wanted from the beginning was what I had originally ordered.