Polar Aurora 23" Yoga Ball Balance Trainer Fitness Pilates Strength Exercise Workout Gym Core Strength Abs Agility Traine w/Resistance Bands Power Line Pump Balance Trainer combines all the elements of fitness cardiovascular toning and flexibility into unique and highly effective combinations. Challenging and fun, the Balance Trainer gives a whole new meaning to "moving with control" as you work out on an unstable, dynamic surface Dimension: 23 ; Height of Ball:10(25cm); Weight:14.5Lbs Material: PVC Ball and ABS Base Package Includes: 1 X Ball 2 X Elastic Strings 1 X Air Pump 1 X Valve Plug 1 X Ball 2 X Elastic Strings 1 X Air Pump 1 X Valve Plug Do you want to use the scientific way to keep your body healthy? This Balance Hemisphere Yoga ball is suitable for you. It is a tool which is used to cooperate in sports fitness ball games. It not only can help us effectively strengthen physical health, but also the effect of weight loss. It is a tool which is used to cooperate in sports fitness ball games.