The THERABAND Pro Series SCP Exercise Ball is the latest offering in ball technology. This ball was specially designed to deflate slowly if punctured, thereby reducing the risk of injury. It also provides improved stability at the points of body contact and enhanced performance due to the responsive surface design. It is most comfortable exercise ball patient's will sit on and the best one they'll grip, thanks to built-in latitudinal ridges and and outstanding texture that doesn't feel like plastic. Each slow-deflate exercise ball comes with two plugs, an inflation adapter, a measuring tape to help insure proper inflation, and a poster detailing 24 exercises.