[55cm]

Product Introduction: Gimnik Pearl Sitting 55 BRQ: This is a very durable balance ball with feet made of the same material as the gimnik balance ball, when you do not use it, you can leave your feet underneath it so it wont roll around easily. It is the same as a gimnik balance ball. It can be used for a wide range of purposes, such as relaxation, stretching, training or as a chair. Use it as a chair in your office or home to create a natural correct posture. BRQ (Burst Resistant Quality) is a quality that slowly releases air without bursting if a hole is punctured. Japan G Ball Association Certified Ball: This product is certified by the NPO Japan G-Ball Association as it is recommended for safety and durability when used for exercise. Size: Maximum Diameter: 21.7 inches (55 cm) (not including feet); Color: Pearl White; Recommended Age: 3 years and up; Made in Italy; Material: PVC (no phthalate plasticizers); Air pump sold separately. Precautions for Use: The diameter shown on the product page is the maximum diameter. Due to the characteristics of the load-bearing material, the ball is stiff at first and may not inflate to the maximum diameter at a time. If you want to close to the maximum diameter, please take a little time (about 5 times per hour).