- // Features
*Designed with half massage surface for comfortable, and the other half surface just like normal gym ball for balance exercise.
* Perfect for strengthening the abdominals, core and lower back muscles.
*Great for improving your strength, flexibility, balance and posture.
* Produced by Taiwan manufacturer with good quality.
- // Specification
Size: Dia. 55cm, 65cm
Material: PVC (Pass 6P)