Thera-Band® Exercise Ball. Increases flexibility and coordination. Helps develop core strength. Each ball includes replacement plug and adapter. High-quality, nonslip vinyl construction with latitudinal ribs for easier grasping. Weight-tested to hold up to 600 lbs. when properly inflated. Includes full-color poster featuring 24 exercises. Pump sold separately. Includes colored tape for accurate inflation measurement Red55 cm, 22"5'1" - 5'6" (61" - 66") recommended patient height. Bulk ball with no packaging.