Photo 1 of STOROMO Exercise Ball,Yoga Ball(with Exercise Tutorial)?Extra Thick Non-Slip,Holds 2500 lbs, Workout Ball for Pregnancy Birthing and Balance Stability (Purple, 45cm/17.7in)

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Photo 1 of STOROMO Exercise Ball,Yoga Ball(with Exercise Tutorial)?Extra Thick Non-Slip,Holds 2500 lbs, Workout Ball for Pregnancy Birthing and Balance Stability (Purple, 45cm/17.7in)Photo 2 of STOROMO Exercise Ball,Yoga Ball(with Exercise Tutorial)?Extra Thick Non-Slip,Holds 2500 lbs, Workout Ball for Pregnancy Birthing and Balance Stability (Purple, 45cm/17.7in)