Specification:         

 Made of PVC material, safe and environmental;

 Diameter 14”&16” available.

Features:   

 Smooth side with beveled edge for comfortable sitting;

                    Portable and the air volume can be adjusted;

                   Any color available.

Usage:

                   Encourage proper sitting posture, avoid slouching in office;

                   Strengthen abdominal and low-back mucles;

                   Used for balance and ankle stability workout.