The Ball Chair Frame turns your 55cm Exercise Ball into a rolling Active Office chair. This frame has 5 legs with pin locks for safety, giving you the best base for your ball. Get all the benefits of sitting on an exercise ball with the stability and movement of an office chair.

• Maintain proper posture while engaging core muscles
• Removes compression from the spine - great for relieving back pain
• Use with any 55cm (21") ball & has 4 height settings to suit most users