... king fitness company produce pilates ring, yoga ring,ab fitness, pilates power gym,ab gym,sports equipment,gym equipment china king fitness ... company produce pilates ring, yoga ring,ab fitness, pilates power gym,ab gym,sports equipment,gym equipmentFeatures:1) 12" ... , biodegradable and nontoxic ring2) Tones arm, leg and AB muscles3) Develops core abdominal muscles and back strength4) Enhances ...