Photo 1 of Trideer Extra Thick Yoga Ball Exercise Ball, 5 Sizes Ball Chair, Heavy Duty Swiss Ball for Balance, Stability, Pregnancy and Physical Therapy, Quick Pump Included (Black, M(19-22ines/48-55cm))

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Photo 1 of Trideer Extra Thick Yoga Ball Exercise Ball, 5 Sizes Ball Chair, Heavy Duty Swiss Ball for Balance, Stability, Pregnancy and Physical Therapy, Quick Pump Included (Black, M(19-22ines/48-55cm))Photo 2 of Trideer Extra Thick Yoga Ball Exercise Ball, 5 Sizes Ball Chair, Heavy Duty Swiss Ball for Balance, Stability, Pregnancy and Physical Therapy, Quick Pump Included (Black, M(19-22ines/48-55cm))