Photo 1 of Core Balance Exercise Ball for Workouts, Anti-Burst and Slip Resistant, Swiss Yoga Ball for Pregnancy, Stability, Fitness and Physical Therapy, 4 Sizes, with Pump (33" / 85cm Grey)

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Photo 1 of Core Balance Exercise Ball for Workouts, Anti-Burst and Slip Resistant, Swiss Yoga Ball for Pregnancy, Stability, Fitness and Physical Therapy, 4 Sizes, with Pump (33" / 85cm Grey)