Prism Fitness Smart Stability Balls
The Smart Stability Balls are self-guided for users at all fitness levels. They feature 13 exercises that are printed on the ball for easy reference.
Three sizes available, each are burst-resistant (PVC construction) and includes a pump.
1/2 Circumference: Inflations Hole to opposite Side of Ball (Injection Spot)
For Diameter 55cm, 1/2 Circumference Should Measure 86cm
For Diameter 65cm, 1/2 Circumference Should Measure 102cm
For Diameter 75cm, 1/2 Circumference Should Measure 118cm