Ken only ball 50mm (2 pcs Set + exclusive bag) It is an original product from regular shop for contact juggler - CJ specialty shops. Chinese medicine - to stimulate acupuncture points of hand, concentration up in soothing tone It aroused right brain left brain by turning left and right hands - (reflex therapy) reflexology. Health goods - to promote blood circulation, to be meek the body. Chrome color and rare simple - standard model.