AW 22.8"/58cm Yoga Balance Ball w/ 2 Elastic Strings Fitness Strength Exercise Ball Balance Trainer Can be use on both surfaces Features massage dots on the bottom Made of soft PVC - non-toxic and durable With 2 elastic strings for keeping balance; Comes with air pump Overall Dimension(LxWxH): 23 1/5" x 23 1/5" x 7 1/2" (59 x 59 x 19cm); Weight Capacity(Max): 200kg (440Lbs) Heavy Duty Balance Dome Ball suitable for Gym or Home Use. It is a great device for core stability and proprioception training. It is perfect for targeting multiple areas of fitness like endurance, strength, balance, and stability. As both sides of the Balance Trainer can be utilised it is ideal for a wide array of users from the young, the elderly, the injured or the elite athlete. Made of soft PVC - non-toxic and durable With 2 elastic strings for keeping balance Can be use on both surfaces Features massage dots on the bottom Increases core strength, improves body balance, stability, coordination, endurance, flexibility etc. Comes with air pump Overall Dimension(LxWxH): 23 1/5&#034; x 23 1/5&#034; x 7 1/2&#034; (59 x 59 x 19cm) Weight Capacity(Max): 200kg (440Lbs) Product Weight: 3.4kg (7.5Lbs)