Milliard Anti-Burst Gym Ball with Pump - White Anti-burst rubber compound prevents the ball from violent bursting if punctured. Simple to use and easy to integrate into almost any training regimen. Great for use at the gym, in yoga, or in your living room. Bounce it, balance on it, squeeze it, roll on it  make it into a fun routine for adults or for children! No moving parts to break, batteries to change or long manuals to read. Gym ball measures 65cm and includes hand pump for inflation