Christmas Sale! Wawavita Anti-burst Gym Ball-yoga Ball/balance Ball/fitness Ball 65cm and 75cm Exercise ball/Yoga ball workout kit Anti-burst yoga ball can improve the balance ability and be used in rehabilitation trainings Inflation instruction: Take out the inserted white plug (air stopper) from the ball, insert the tip of the pump and inflate the ball to good size, and then replace the white plug back into the hole quickly. Comes with instruction sheet, air pump, and a high-quality & anti-burst Balance Ball Two size available